Mistaken Identity: Danny immediately becomes attracted to Amber when he first meets her. However, Amazi-Girl is depicted in such a way that she could have a lot of hair, and her modus operandi is very similar to that of Batman. You know who else has a lot of hair and resembles Batman? Sal, who was Danny's First Love in Roomies!.
The Reveal / The Unreveal: When Amazi-Girl was introdiced into the strip, David Willis claimed we would never find out her real identity... despite Amber, her "civilian" identity in Shortpacked!, appearing not long after. Fortunately Willis still had cards up his sleeve, and Amber's motivation for donning her mask and cape are very different than they are in the mainline continuity.
Jerk with a Heart of Gold: Talks a good game about not wanting to be friends with the rest of the cast but still spends all her time with them, helps set-up Walky with Dorothy, looks out for Joyce and even showed concern for Ruth, her tormentor and confused love interest. She also tries to pay off Raidah after Sarah hits her without much success.
Only Known by Their Nickname: Walky bestowed it on her during their childhood, in retaliation for her calling him "Walky," and evidently it's just stuck.
Race Lift: In mainline continuity, Billie was just white, but apparently Willis got asked enough if she was Asian during its run that he decided to make her half-Asian here.
Everyone always assumed she was Asian back in Roomies!, what with the black hair and fair complexion, even though she was conceived as thoroughly English. So I figgered this go-round, hey, she’s half-Asian, why not? ... Her dad, of course, is still white through-and-through, because, dude, last name’s friggin’ Billingsworth, man.
Ascended Extra: She's seen in the background of a number of panels before she's formally introduced. Readers of It's Walky picked her out immediately, of course, but to newcomers she would seem to have evolved out of the woodwork.
Beneath Notice: Often finds herself trapped between the door and the wall of the room she shares with Amber.
Berserk Button: For as angry as she can get, anyway. Just don't question the existence or nature of dinosaurs around her. And with recent events, deny the Theory of Evolution.
He actually has a list of times when it's not appropriate to hit on a girl.
Hidden Depths: As shown in interactions with Joyce, Walky and Danny, Joe is very capable of being the Only Sane Man and calling people on their stupidity... He just usually isn't willing to be. At least in Joyce's case it seems to have stuck.
Mike:If you really are doomed to follow your parents' pattern, and you're never the one picking the jerks...which of them does that make you?
Jerk with a Heart of Gold: While he still goes out of his way to say things in the most negative way possible, he is far more involved in the emotional affairs of other characters, and thus his compassion fairly plain to see.
Sink-or-Swim Mentor/Stealth Mentor: This appears to be Mike's modus operandi in this universe — rather than just him being a straight up Jerkass, his behaviour seems to be more a subtle way to get people to realise their failings and act on improving them.
Tsundere: Towards Billie, to the point of being outright abusive.
Deconstructed: Ruth behaves this way because she has anti-social tendencies and a bad home life. Billie confronts Ruth demanding to know what their relationship is, after weeks of Ruth alternating between (awkward) displays of affection and bullying. When Ruth suddenly kisses her during all of this, she tells her to fuck off and runs away. Billie is very confused and hurt by whatever attraction she does feel. It's still played for comedy, but the situation is acknowledged by Willis as unhealthy and just wrong.
Daddy's Girl: Perhaps by default. Her father makes a point of hugging and complimenting her on Parent's weekend while her mother is too obsessed with the idea of her brother actually having a girlfriend to even acknowledge Sal's presence.
Dark and Troubled Past: Held up two convenience stores as a teenager, and was sent away to a Catholic boarding school in Tennessee. Walky claims he has barely spoken to her in five years.
Expressive Hair: Her natural curls reassert themselves when she is shocked by a bad grade.
Hot for Teacher: Screws her TA (Jason) hoping to improve her Math grade, and when that doesn't work screws him again to show him how angry she is.
The Unfavorite: Perhaps understandably, considering her track record, but she just as understandably resents it. Of course her track record may also have been a reaction to being the unfavorite, since David's Brilliant but LazyMan Child tendencies probably got him a lot more attention because he required a lot more parenting.
"Yeah, I'm gonna keep ten paces behind you."
A bitter (for very complicated reasons) sophomore, who ends up rooming with Joyce.
Dark and Troubled Past: Got her very-popular freshman-year roommate Dana pulled out of school after she went on a death-of-mother-fueled drug binge, endangering both her health and Sarah's ability to maintain her scholarships.
Dorothy: Um, Leslie, a boy just threw a toy at my head. Leslie: It's probably because he likes you. Walky:[crush blush]
Odd Friendship: With Joyce. It's also of the oddest ones she's developed because on the surface they have nothing in common, and deep down they... still have nothing in common. The basis of their friendship, at this point, is simply that they have the same lunch gap between the same two classes. This is particularly amusing because in mainline continuity, they're THE Official Couple. At least now they have Dexter And Monkey Master fandom to bond over.
No Party Given: Played with and nearly averted. It is strongly implied that she ran as a conservative Republican (mostly to curry favor with the redneck vote in her district) but is not actually all that conservative, and may in fact have no principles at all.
Not as You Know Them: Her immature personality is mostly the same to her Shortpacked one, but she's preoccupied with forwarding her political career and impressing lobbyists and voter blocs. The result is that this Robin comes off as kind of a gladhanding sleaze.
Robin's extremely liberal younger sister, with very strong ideas on sexual freedom.