AU Bio: A TLMtCE AU (The Little Mistake that Changed Everything; where slight changes result in totally different timelines) for Mu Qi Ling, season 1.

Storyline So Far:

1.  When Luo Fei and Ling Xi are captured, Ba Li, who was supposed to rescue them, was late, and they never win the war. A year afterwards in the human world, just after he stops Mo Wang from infecting everyone with diseases (Cao Ben Jia Ting series) , Luo Fei's childhood friend, Hse Tsing/ Peng Yan Sheng, and two of his classmates, Yu Tian Heng and Hao Lei, are recruited during a field trip to stop the war once and for all. By their sides are Cao Ben Zai/Herbie, Yan Sheng's partner, and Ba Li, in deep regret after failing to rescue the two. Tian Heng and Hao Lei get their own partners, and they soon manage to defeat not only "Hei An Mo Wang" {Sadly, I've forgotten the name of the main antagonist of the first season. ;-; } but also Mo Tian, rescuing Luo Fei's dad in the process. 

2. During a vacation to Korea, a year after the events of the first storyline, they meet some new people named Shirota Mahiru, Kuro, Alicein Misono, Lily, Sendagaya Tetsu, Hugh, Licht Todoroki, and Lawless/Hyde along with Licht's manager, Krantz, and the cute whale mascot Gil. Out of nowhere, they get attacked by Lila, an old friend of Mahiru's, who sucks some of Yan Sheng's blood, revealing that he's a vampire, and so are Kuro, Lily, Hugh and Lawless. After chasing him, Lila is cornered by the Tobot pilots of Daedo City, but manages to convert one of them, Cha Duri, to his side before they disappear. Their adventures lead them to find help in Ling Xi (and their partners too), the Athlon pilots, the Pilots' old friends, Dokgo Ogong, Dokgo Ondal, Guk Suho, Kim Nokwon and Yoo Pyodol, the Galaxy Masters & their friends, and the combined group of the Eco Team and the YSP Club from Y Gakuen. When they go to Jeju, they meet Swag, the original Galaxy Weapon 4, and it's revealed that Lila is just a puppet; behind him is Hugh/Old Child alongside Alicein Mikuni and Jeje/Death Death. After trapping Jiba Jinpei into his own darkest memories, the group has to save him before it's too late. Thankfully, they manage to stop them, and Tetsu makes an actual contract with Hugh, and soon it's time for them to leave. They exchange contacts and promise to keep in touch before they leave. 

Characters: 

1. Peng Yan Sheng / Hse Tsing => partner to Ba Li and Cao Ben Zai, skipped a grade after Luo Fei's disappearance, the current guardian of the Herb Wonderland

2. Luo Fei => partner to Song Ka and Ya Li, was held prisoner and brainwashed (shortly) before he is rescued, partner to Satori-chan

3. Ling Xi => the princess of the Lü Ying Dao kingdom, was brainwashed and became a general serving the darkness until she is saved, partner to Xiao Kui

4. Yu Tian Heng => partner to Tie Mu, originally a bit antagonistic, but soon realises his faults and develops a bit, is currently dating Hao Lei

5. Hao Lei => partner to Da Shan, is currently dating Tian Heng

6. Cao Ben Zai/Herbie => Hse Tsing's partner, comes from the Herb Wonderland, cares a lot for Hse Tsing

7. Ba Li => the reason Luo Fei and Ling Xi got captured, partner to Hse Tsing, comes from Lü Ying Dao, used to be under the darkness

8. Song Ka => one of Luo Fei's partners, impulsive but cares a lot for Luo Fei

9. Ya Li => one of Luo Fei's partners, calm and somewhat calculating

10. Tie Mu => Tian Heng's partner, reserved yet determined rebel

11. Da Shan => Hao Lei's partner, cheerful but serious rebel

12. Luo Fei Ming => Luo Fei's dad, worked for Mo Tian until he was freed

13. Li Shen Zhen => the previous guardian of the Herb Wonderland, Hse Tsing's mentor, previous  Eve of Old Child

14. Xiao Kui => Ling Xi's partner, was brainwashed alongside Ling Xi

15. Time travelers => they used to be Luo Fei and Ling Xi's enemies, but they soon turn good after stopping Ba Li from rescuing the two and helping behind the scenes. 

16. Mo Tian => secondary antagonist, but ends up turning good

17. Shirota Mahiru => Eve of Sleepy Ash, the 'mother hen' of the Servamp group

18. Kuro/Sleepy Ash => Servamp of Sloth, can turn into a cat, was given a bell by Mahiru as a sign of their contract

19. Alicein Misono => Eve of All of Love, rich tsundere, cares for his friends

20. Lily/All of Love => Servamp of Lust, can turn into a butterfly, used to have a pocket watch, but was broken

21. Sendagaya Tetsu => Eve of Old Child, silent but cares a lot, wasn't contracted to Hugh until he gave him a hairclip to show their contract. 

22. Hugh/Old Child =>  Servamp of Pride, was the Mastermind behind Lila

23. Licht Todoroki => Eve of Lawless, genius pianist

24. Lawless/Hyde => Servamp of Greed, used to be antagonistic towards Kuro, but changed his mind, calls Licht Lich-tan

25. Cha Hana => the first Tobot pilot, cool, calm, cares a lot for his brother, is revealed to be good with long-range attacks, can also use magical programming

-> X => cool, mature, but expects others to be the same, especially Hana

26. Cha Duri => the second Tobot pilot, seems like an arrogant lazy person, but is actually a kind person with an innocence, has depression and slight split personality disorder, is good with using a kitchen knife as his weapon, good with magical programming, Hana's twin brother

-> Y => cares a lot for his partner, joined Lila to try to convince him to come back

27. Kwon Semo => down to earth, likes music, is revealed to be a martial artist like Suho

-> Z => cares for Semo, doesn't let him do anything reckless *hem hem*, cares a lot about what Semo thinks of him

28. Ju Dingyo => smart, somewhat arrogant, fought a lot with Duri, good with electronics

-> D => innocent, playful

29. Cha Doun => one of the two creators of the Tobots, Hana and Duri's dad, has had one of the biggest impacts on Duri's mental health due to his bias towards Hana

30. Kwon Limo => the other creator of the Tobots, used to be evil, Semo's dad, was the final nail to Duri's mental coffin, very very oblivious

-> Zero => was destroyed when Limo was evil, but was fixed with Angela's help, is not a combat Tobot, but a rescue one

31. Kim Nebok/Neon Grimm => head of the Grimm Society, good with words, cares for his friends, is dating Duri

-> R => used to be partnered to Professor Noh, acts like a reporter

32. Dokgo Ogong => programmer, engineer, loves his brother, has a crush on Duri

-> Mach W => dramatic, cares a lot for the brothers

33. Dokgo Ondal => Ogong's brother, innocent

34. Guk Suho => shy, taekwondo expert from his dad, snores (XD) 

-> Taekwon K => tight, cares for Suho

35. Kim Nokwon => nature lover, innocent, used to be engulfed with darkness in the past

-> Terracle => pure, oblivious

36. Yoo Pyodol => Nokwon's uncle, cares for him

-> Cargo => calm, fights with a clear mind

37. Lila => Tsubaki's subclass, went crazy because of Tsubaki's disappearance, recruited Duri, but was manipulated by Hugh, becomes good afterwards

38. Tsubaki / Infinite Warrior => Servamp of Melancholy, gets bored easily, cares for Uju and his subclass, slowly gets used to the chaos

39. Oh Hera => police officer, awkward, pure

-> C => uptight, cares for the rules

40. Tak Haeil => Athlon pilot, shortie (XD), has a strong sense of justice

41. Suri => salty, caring, recklessly pursuing the truth

42. Gangpung => impulsive, likes eating sausage, Athlon

43. Cha No-Eul => Athlon pilot, a bit arrogant, but cares for his friends

44. Tak Goun => Haeil's mom, clumsy but intelligent

45. Tak Wonman => Haeil's dad, does the housework

46. Tak Daeil => Haeil's little brother, innocent but mischievous. 

47. Oh Pu-Leun => Chanoeul's friend, sensible

48. Nam Moksae => Chanoeul's friend/rival, kind

49. Han Kyeol => Chanoeul's friend, shy

50. Nice Joe => Chanoeul's mentor, previous Athlon pilot

51. Rosen Krantz => Licht's manager & "babysitter"

52. Guildenstein => Lawless's subclass &"babysitter"

53. Kang Taeyang => detective who solves small cases,  works hard, has difficulty accepting others, warm, Galaxy Master of Galaxy Weapon 1, leader of the Galaxy Detectives

54. Oh Pilseung => Galaxy Master of Galaxy Weapon 4, cares for his friends

55. Rosie => Unicorn's princess, Taeyang's friend, part of the Galaxy Detectives

56. Kongdu => Rosie's companion

57. Gyeongpo => Taeyang's friend, part of the Galaxy Detectives

58. Jihae => Taeyang's friend, part of the Galaxy Detectives

59. Ji-uk => Jihae's younger brother, part of the Galaxy Detectives

60. Namhui => used to be Taeyang's "rival", part of the Galaxy Detectives, likes Rosie

61. Pada => cool, calm, collected, Pilseung's younger brother

62. Pori => cheerful, Pilseung's friend

63. Uju => genius inventor, becomes the Eve of Tsubaki during a battle, gave him his watch as a sign of their contract, part of the Eco Team

64. Beom => used to work for Sigma Corp (huge energy corp with no regards for the environment), is dating Young, was aged down by the Archean stones, part of the Eco Team, calm yet reckless at times

65. Young => is dating Beom, Uju's grandfather, was aged down by the Archean stones, inventor who makes too many mistakes, part of the Eco Tea,

66. Sinae => part of the Eco Team, girly, likes music

67. Taesan => part of the Eco Team, likes eating, rich, son of company CEO

68. No-eul => part of the Eco Team, uses his brains, "babysitter"

69. Suho => leader of the Eco team, loves nature (a lot)

70. Jiba Jinpei => one of the people born with YSP power, was brainwashed by being locked in his darkest memories, but breaks out, was thrown out by his rich parents due to his powers, lives in an orphanage, is dating Sandayuu, uses the UR Watch

71. Koma Sandayuu => Jinpei's childhood best friend, is dating Jinpei, cares a lot for him, born with YSP power, uses the YSP Watch

72. Tamada Matarou => Jinpei's friend, doesn't have YSP power, but can transform into T-Dine, uses the YSP Watch Gaia

73. Himekawa Fubuki => Jinpei's friend, uses the YSP Watch, inventor

74. Raido Mera => Jinpei's friend, calls Jinpei Aniki, uses the YSP Watch

75. Kyubi Ryuusuke => Jinpei's friend and senpai, uses the YSP Watch Zero

76. Kirigakure Ranto => Student Council President at Y Gakuen, strict but kind, uses the Alien Watch, parents and younger sister were killed by N aliens, swore revenge

77. Kumoike Kumako / Nanakumo Kuuka => Ranto's childhood friend, cares a lot for him, made all the watches, uses the UR Gaia with Matarou

78. Hebiyama Chiaki => was experimented on by the aliens, has scales on his body, uses the YSP Watch, part of the Gakuen Mafia

79. Mitsumatagi Nozuchika => Chiaki's friend, leader of the Gakuen Mafia, uses the YSP Watch

80. Usumizawa Haruhiko => teacher at Y Gakuen, Nayu's helper

81. Kuruhoshi Nayu => alien whose home was destroyed by the N Aliens, quiet

82. Swag => the "key" to unlocking Final Mode for vampires, used to be Galaxy Weapon 4, Taeyang's friend

83. Alicein Mikuni => Misono's older brother, somewhat cuckoo, but was redeemed before arrest, Eve of  Death Death

84. Jeje/Death Death => Servamp of Envy, used to Mikuni's mom's Servamp

85. Motomiya Daisuke => Nebok's younger brother, partner to Veemon and Fukunyan, loves his brother while teasing him a lot

86. Izumi Koushirou => Daisuke's friend, knows Hana and Duri, helped the two when they were in Japan due to Yamaki

87. Mitsuo Yamaki => Doun and Limo's childhood friend, attacked Hana and Duri mentally after "adopting" them

88. Natsuki Enra => teacher at Y Gakuen, is one of the most beautiful ones there, cruel, manipulative, horrible, selfish

89. Professor Noh => Doun, Limo and Goun's teacher from university, optimist

90. Amano Keita => Youkai Acknowledger, friend to Kinya and Doun, has two kids

91. Cha DongTak => Hana and Duri's distant cousin, detective at Seoul Metropolitan Police Agency, is dating Jian, physical

92. Song Jian => reporter, is dating DongTak, rough but sweet 

93. Gong Soochang => DongTak's partner, old leader of Grimm Society

94. Daiouji Kinya => headmaster of Y Gakuen, has a daughter who he dotes on