I don't really think it's necessary to reserve anything since people are usually considerate enough to not double up on an already presented idea. But for the sake of conflict avoidance, it's reserved.

Status Ailments mind need to be altered a bit though. 
Status Ailments are pretty clear in a Persona/SMT game, but I'm not sure how effective it'll be in a no-stats RP. 
Shadows for the most part (Yes I'll call them that) are mainly immune to ailments and only have an active/inactive state. (I doubt they need to sleep, lower tiers are too stupid to get confused, poison... dunno? and Paralysis is the same as inactive). 

Tried to think of an alternative but currently only pulling blanks. 
Again I'd be happy to discuss ideas.