On the Subject of RWBY mmo:
So the way I figure, ruby herself is the one the game seems to center around. Started off when she was younger just after Summers death, though it only really became noticeable once she obtained her first weapon. She keeps it quiet, eventually only telling her family about it, and extending a group invite to yang. Once you receive an invite, be it to the group, raid, or guild, you are effectively playing as well.
As for the MMO i'm using as a base? It's more or less Guild wars 2, which is the game i'm most familiar with, and with the most wiggle room on classes and such. Granted, the game design doesn't allow for 1:1 due to the breath and scope of what weapons/semblances the cast has, but I think it works well. has added stuff like health potions, aura potions, etc, provided someone is the appropriate trade skill to craft them.
At first, the characters would only have their normal skills from canon, but once they start 'playing', they do start to pick up some of their class skills. A class is assigned automatically to everyone she meets who has aura unlocked, though they are marked as an NPC unless they are also 'playing'.
So i'm thinking so far:
Ruby: Reaper (silver eye reaper shroud is OP as heck though)
Yang: Berserker
Weiss: Weaver
Blake: Chronomancer (them clones yo!)
Pyrrha: Herald
Jaune: Firebrand
Nora: Scrapper
Ren: Soulbeast
Others:
Velvet: Holosmith
Penny: Engineer
Qrow: Spellbreaker
Coco: Deadeye
Cinder: Renagade
Mercury: Thief
Emerald: Mesmer
Goodwitch: elementalist
Neo: Mirage
Ozpin: Revenant
Raven: Tempest
Taiyang: Dragonhunter
Sun: Daredevil
Port: Warrior
Olbek: Ranger
Etc and so forth.
Quirks: once you start playing, certain game cliches start to appear. Loot drops from mobs, you have an "inventory", stats, etc. Gathering points become available, and curiously, multiple people can gather from the same one. Everyone sees their own loot, and you can use the tradeskills to make stuff. You have a UI as well, though it can be hidden. You can be downed, or rezzed, though their are downsides to this, and rezzing leaves you in an unrezable state for some time. Once playing, you can "send" messages to each other in game, regardless of distance.
Since they collect loot from farming/gathering/etc, the cast has a hobby of team training in the emerald forrest, as well as buying goods from vale. Since things drop money, they find themselves with quite a lot as the story progresses. Sparring with fellow students shows as Structured PVP to them. Different areas seem to have some different drops.