https://m.youtube.com/watch?v=kpic7X2rGkISo, for the anon who was working on the Gen 0 Gets Buff story and looking for character references and personality references, this 2020 shellnut video is a pretty good start... for everyone except AZKi.
Roboco is a high-spec robot who's surprisingly chill, although she's supreme when it comes to FPS games like Apex. If you want to use her for exposition for military hardware, warships, etc, she'd probably be the best to know what's what.
Miko is fucking amazing. Her GTAV clips are probably the best showcase of her, she's hilarious, she's hyper, but she's also adorable and sweet, even while shouting FAQ at the top of her lungs. She's supposedly a shrine maiden in lore, although it's questionable how much of that she actually does.
Sora is the embodiment of seiso. A "normal girl" who started the whole Hololive thing as the first talent, kind of an elder statesman. She's what you think of when you think of a singing idol. Kind of a girl-next-door, but she's a singing goddess. Has a somewhat sentient teddy bear named Ankimo.
Suisei is... a lot of things to a lot of people. She started out in INNK with AZKi, but got so frustrated over the company putting all their energy behind AZKi and ignoring her (There's not been any bad blood between the two of them personally, though, IIRC, and all fences have been mended) that she almost quit vtubing, but ended up hitting it big in Hololive proper and jumped ship. She's a super-talented singer, and a bit of a psychopath, so if any of the girls are going to HAVE to kill someone, Suisei will have no problems doing the deed.
Fun fact: Kanata and Coco live together IRL, and Suisei is their neighbor. So if you want to somehow work Best Dragon into the story, that's an easy way.
Holomem comes to look for Coco, come to her apartment, and some tall busty black-haired delinquent chick answers, says her name is Kson Onair. Holomem asks where Coco is, Kson gets all flustered, shuts the door, LOUD NOISES, minutes later Coco comes out.https://m.youtube.com/playlist?list=PLpt61bADOMwW2aA9I1hWHyR8OixSuCXzcFor AZKi lore, check out her first several music videos, especially the ones for Shit Days, From A to Z, Creating World 2020 and Without U. They're music videos so canon is hazy, but there's AZKi White for her older more cheerful songs, AZKi Black for her older darker songs, AZKi 2nd is the one most of us know and love with the bowl cut and the puffy black jacket, and the current little adorable bundle is AZKi 3rd. She's kind of a music autist, rarely ever streams but has far more concerts and singles than any other holomem... I think she's up to 50 original songs or so in just a few years, and almost as many covers.
SorAZ, the pairing of Sora and AZKi, is pure kino.
https://m.youtube.com/watch?v=uEeXFhw2TyYAlso, AZKi's official bio lists her as A diva who became reborn into the virtual world in order to fabricate a new world. No matter the time, place, or position, she warps through all the barricades with her dazzling talent. So if someone needs to unfuck something in space-time, she could probably do it... as far as being by far the largest and most musclebound.
Also, if you need someone to fuck up time and space somehow... two words. [spolier] Smol. Ame.
Also, don't mind the wall of text. I'm taking this opportunity to test out a new Bluetooth keyboard. It's smol, but it works. 
