First try...

🔱The Gulper🔱

- Surprising no one, Gulper is a huge glutton.

- Gulper is actually the initially nameless offspring of a giant mutant slug and a mutant fish. His premature jello body was left into the Gelatinous Caverns to incubate. His parents weren't careful with where they were going with their lives, thus ending up with a kid they didn't want. As he would say, "Gulper never met his parents..."

- Despite not being that intelligent, Gulper has a decent taste in music and art.

- Speaking of art, he also likes making his own. His favorite way of doing it is using food as paint.
- Gulper flunked out of school many times, but he's doing everything he can to pass. So far, he isn't having any luck.

🌱Chompy Mage🌱

- CM started out as a magical human who grew up without any friends. However, it is true that he was raised by Chompies, so he had a talent with talking to them. It is actually speculated that CM has Chompy blood within him, but that's what his puppet says and he believes. 

- Because he was friendless in his beginnings, CM's Chompy guardians sewed him his puppet to keep him company.

- CM is fluent in Chompy Growl and Chompy Glyph (their written language).

- CM actually is a great teacher for juvenile Chompies. In fact, he sometimes acts as a nurse/substitute daddy for newborn ones.

- CM loves singing in the shower.

🌶Chef Pepper Jack🌶

- Pepper Jack is the guy catering the Doom Raiders. Either he cooks their food, or they steal food from others.

- PJ was an ordinary pepper who was brought to life by a magical cook who was getting old and needed somebody to take over his chef blimp, but had no one there. He used the pepper because nobody liked his peppers. During his first few years in this culinary environment (and while training at a culinary academy), PJ was already well on his way to fame.

- PJ loves Mexican food. He's also a fan of jazz and plays it often in his blimp.

- When he found evil recipes, he found them even better than his original ones. That's how he ended up succumbing to the dark side.

- His company has this yearly event called "Barbecue Special," where there'd be a carnival with stuff like rides, games, cook-offs, employees sharing their ideas for new dishes and the whole shebang. PJ always joined in on the fun (and stole the show here and there).

💤Dreamcatcher💤

- There was a time when Dreamcatcher actually used to have a body. However, due to having possessed extraordinary mental abilities, her head pretty much took over her entire being, and her body painlessly fell off one night in her sleep.

- Dreamcatcher's organs are all stuffed together behind her skull. This explains why that floating head is so big.

- Dreamcatcher and Persephone were high school besties. They never spoke to each other again after Dreamcatcher was thrown in jail shortly after graduation.

- Dreamcatcher's sweet tooth is what caused her yellowish teeth and having to get braces. That and the fact that she took pretty bad care of her teeth.

- Dreamcatcher has social media. She was inactive from it while in prison. When in the mood, she uses the "UwU" face.

⚙️Dr. Krankcase⚙️

- Krankcase keeps a lot of his gadgets handy within his hat, which kinda serves as his emergency backpack.

- As evident by his quotes, Krankcase has an obsession with goo. This is actually because goo has a special meaning to him.

- Evil goo is what made Krankcase turn green. Even before he did, he had amphibian-ish traits.

- Though not licensed to do so, Krankcase occasionally practices medicine.

- Krankcase can play the piano and is incredibly good at doing so.

☠️🎶Wolfgang🎶☠️

- When Wolfgang unleashed his rage after everybody booed and was hurt by his musical piece, he didn't actually turn into a werewolf until he stood under the moon for too long while out ranting in the woods.

- The princess Wolfgang was supposed to marry had found herself a replacement groom a long time ago. When he found out about that, he cried.

- I recommend not underestimating Wolfgang's musical skill. State any instrument at all, and he'll be able to play it. He can even find music outside of musical instruments!

- His main genre is rock, but he can also play classical, folk and others.

- For a time, Wolfgang toured with the Skaletones, and he's been to numerous places in the world because of it.

⚱️Golden Queen⚱️

- The Golden Queen was a member of a royal family many years ago. When she became queen, she pretty much had everything, getting everything she wanted when she wanted it. It was never enough for her. After she died, a powerful earthly force resurrected her, turning her body into solid gold. When she rose, she began her stealing spree.

- She can't seem to keep the other Raiders in check. They're always up to some sort of shenanigans whenever she's away doing something on her own. 

- GQ has tried dating before, but it never worked out. 

- GQ's favorite food is probably cheese. Due to having an immune system made of gold to go with her golden body, though, she can't digest it very well.

☀️Luminous☀️

- Luminous became overlord of the Light element when he was just 13 in Star years.

- The reason Luminous is so fearful of the dark is mainly because of his species. Being in the darkness for too long actually reduces the health of a Star and even will kill it if the Star is dim or small enough, so he wanted to extinguish all darkness because he was paranoid it would kill him.

- Being a Star, he doesn't have to eat or drink, and space dust comes out of his eyes when he cries. 

- Truth be told, Luminous is actually in love with Mags. And by that, I mean he's got it BAD. He first saw her a long time ago before he was locked up in Sunscraper Spire, and he didn't realize he loved her until after he started to redeem himself. He doesn't want any hard feelings after impersonating Mags since she may not forgive him for it. His confident energy makes it very easy for him to keep his composure. (Boy, was I walking on eggshells while writing that...) If he did have a romantic partner, he would undoubtedly call them the light of his life.

 - Luminous is a great writer.

🌑Nightshade🌑

- While out stealing to show off, Nightshade doesn't realize that he's now going bankrupt. (Kind of ironic, considering he was born rich.)

- It is speculated that Nightshade is a Mabu. This is neither confirmed nor denied.

- Nightshade and Luminous are actually good friends.

- It is true that Nightshade shows interest in Cali. Though, he isn't crazy about her.

- Nightshade is skilled in pickpocketing, burglarizing and picking locks.

- Nightshade holds respect for Flynn. At some points, he shouts "BOOM!" just like Flynn would.