Name: Y/N Tennyson 

Age: 16 

Hair color: black 

Eye color: blue 

Gender: male

Appearance: 

(We'll start off with Sung Jin Woo's first appearance at Season 1 of MHA, I'll let you guys decide which season for the other two appearances) 

Personality: starts off kind, caring, shy, nervous, and embarrassed (in front of attractive and flirty girls) by each season he's also brave, strong, calm, calculating, can be a jokester, fearless, protective, courageous, selfless, resilient, responsible, and sensible to his friends while at the same time merciless, brutal, cold, cruel, heartless, serious, and ruthless to his enemies. 

Likes: His adopted family, Class 1A, heroes, his Omnitrix, his friends, training, helping people, smoothies, and video games.

Dislikes: Vilgax villains, criminals, tyrants, monsters, perverts, heroes not doing their jobs right, arrogant/cocky people, traitors, seeing his friends hurt, and falling to save people.

Family relatives: Ben Tennyson (adoptive younger brother), Gwen Tennyson (adoptive cousin), Max Tennyson (adoptive grandfather), and Verdona (adoptive grandmother)

Powers and abilities:

Superhuman: speed, strength, agility, endurance, senses, intelligence, and stamina.

Skills: Hand-to-hand combat, martial arts, hacking, swordsmanship, marksmanship, piloting, engineering, tactician, and stealth.

Omnitrix 2.0: 

(you can change the color of it if you want) 

Functions: 

The Omnitrix is highly resistant to extreme temperatures and extreme environments, including space, and is highly damage-resistant and highly force-resistant. Once placed on the wearer, the Omnitrix cannot be removed by normal physical means.

The Omnitrix has a built-in energy feedback blast to defend against anyone trying to force it off of its owner. The Omnitrix can show a database image of all aliens unlocked. The Omnitrix can repair Damaged/Mutated DNA (The Hulk doesn't count as someone with Damaged/Mutated DNA due to the Gamma Gene) and restore terraformed planets.

The Omnitrix can genetically manipulate DNA or reprogram a species' DNA (like fuse DNA from different species of aliens).

The Omnitrix can change the aliens' eye colour to match the user's eye colour, a feature that can be turned off.

The Omnitrix has a Recharge Mode which serves to keep the Omnitrix from damaging the user due to having stayed transformed for too long. It's deactivated automatically, once the Omnitrix is recharged.

The Omnitrix has a Life-Form Lock Function that allows the user to stay transformed for an extended period of time without a time-out. It is dangerous to use often.

The Omnitrix has a DNA scanner that will scan uncatalogued DNA and record it. It scans DNA by being near the alien it detects. However, if the Omnitrix is far away from the detected sample, the Omnitrix's other functions will be disabled until the alien is scanned. After scanning the DNA, the alien will be unlocked and available for use.

The Omnitrix can redirect scans from inorganic aliens if the power is boosted. The Omnitrix grants the user full understanding of the aliens' powers upon transforming into them.

The Omnitrix has a Radiation Mode which will be activated when radiation is detected. Upon activation, the Omnitrix will beep and flash red. Radiation Mode can be turned off by turning the Omnitrix symbol to the quarter past position as an alien, or when radiation isn't detected anymore.

The Omnitrix has a Quick-Change Feature that automatically transforms the user back to normal when they are done using their transformation, causing it to not time out and allow the user to transform again far quicker. Manually touching the Omnitrix Symbol while transformed can also be used to transform into different alien forms while already Transformed.

The Omnitrix has a Randomizer Function that turns the user into a different number of aliens at random moments, being randomly selective of the transformations.

The Omnitrix can add extra features to alien forms to make them safer/more stable.

The DNA in the Omnitrix is stored within the Omnitrix itself in a computerised form.

The Omnitrix can Grant its user, as well as an alien form, the ability to speak another language fluently.

The Omnitrix can change the user's Gender.

It comes with Evolutionary Function like the Ultimatrix.

The time-limit has increased from 15 minutes to 45 minutes, with the exception of certain transformations; such as, Atomix, Clockwork, and Ultimate Forms.

Proper safeguards were added to prevent another incident with the sentient Ultimate Forms.

Includes an another feature that downloads a transformation's base abilities into Y/N's mind the first time he uses them. Naturally, he still needs to practice using his new form's abilities in order to properly master them.

The Omnitrix also has the Omni-Enhancement Feature which requires both equires Upgrade and Shock Rock to Unlock.

This feature gifts the transformations with armor that amplifies their abilities. Available Omni-Enhancements include Shocker Armors which are inspired by Shock Rock, the Hi-Tech Omni-Kix Armors, and the Omni-Naut Armors which grants the ability to survive in space on top of being Hi-Tech.

Extensions:

The Omnitrix has a 2-way communication system that can also record messages, similar to voicemail.

The Omnitrix has the functionalities of a regular digital watch.

The Omnitrix has an AI (Artificial Intelligence).

The Omnitrix has a GPS Function along with a Hologram Map.

The Omnitrix can track alien signals.

The Omnitrix adapts the user's clothing to the alien they transform into.

The Omnitrix has a built-in Universal Translator.

The Omnitrix has a distress signal function and a homing device.

The Omnitrix has a security lock system so that it can only be used by the user, as well as an alternate identification program if changes by outside forces occur to the user.

The Omnitrix has a failsafe that protects the user from negative effects, such as being possessed by an Ectonurite, exposure to the dangerous effects of certain Materials, Chemicals, or Elements, or being transformed by Substances or Devices that Damage, Alter, or Mutate DNA.

The Omnitrix has a failsafe that kicks in if the user's life is in jeopardy. This feature turns them into the needed alien to survive.

The Omnitrix has failsafes installed by Azmuth that prevent Galvanic Mechamorphs from tampering with the device.

The Omnitrix has a sort of Reboot Mode to repair it when tampered with.

The Omnitrix has the option of making its symbols disappear.

The Omnitrix can create an alien species.

Voice Control:

The Omnitrix can be controlled by voice command through the Omnitrix user access voice recognition mode:

Command Code 1010 Y/N Tennyson Disengage Life-Form Lock: Disengages the Life-Form lock Function.

Decouple Omnitrix Command Code: 000 - Release Coupling – 0: Removes the Omnitrix.

Omnitrix Self Destruct in (time): Command code: 000 - Destruct – 0: Activates Self-Destruct Mode.

Abort Self Destruct Code 10: Deactivates Self-Destruct Mode.

Omnitrix Reset Code 10: Activates Reset Mode.

Omnitrix Abort Reset Code 10: Deactivates Reset Mode.

Command Function Override Code 10: Overrides function.

Access Master Control: Unlocks the Master Control, but only works to Azmuth's voice.

Color Coding:

The Omnitrix Core can display Ten Different Colours, each meaning something different:

Green: Active

Red: Recharging/Radiation Alert(Blinking)

Black: Deactivated/Inactive

White: DNA Repair/Planetary Restoration

Grey: In Need of Repair/Maintenance

Yellow: Scan/Capture Mode

Blue: Recalibrating/Resetting/Rebooting

Purple: Controlled or Risk of Temporal Threat

Pink: Under Spell Effect

Orange: Self Destruct Mode

Malfunctions:

If the Omnitrix does give the wrong transformation, it is because of the user slamming on the Omnitrix's core and (inadvertently) the scroll pad.

Other reasons for getting the wrong transformation include not perfecting either the preload or proper pressure application and misreading the display.

Overall, incorrect transformations are caused by the user's general sloppiness.

Slamming the core also affects the time limit of a transformation, as the user could stay transformed for hours.

When switching between aliens, the user could be manipulating the controls. Transforming into another alien without changing back does not always work and is bad for the Omnitrix.

The Omnitrix is not hackproof.

The Omnitrix does not have a failsafe against magic.  

Omnitrix AI: 

Since it sometimes never gives Y/N an alien he wants, she'd be an unpredictable, impish girl who loves to confuse Y/N. But when Y/N is in a real trouble, she genuinely tries to help him. She doesn't hate him. It's just that she thinks it's fun to see him flustered.

Omni Armor: 

Hoverboard: 

Pet: Ship

That's all I could think of for the bio. I hope this book turns out to be a success. 

Now I will be doing the alien forms next. If you have any recommendations or if you want us to have a harem, let me know at the comments below. Peace out and enjoy!