Celia I is pretty zoning orientated. Her entire special moveset is based around bombs and missles/projectiles.
She can lock you the fuck down with her I-no dash (Run) and projectile game if you give her a knockdown in the corner.
Not that you can't parry, but when she has her moving projectiles out, they -will- interrupt you mid combo if they can get to you in time. and then she'll get momentum again.
She has a bar for how many bombs/missle/whathaveyou she can set out before it has to refill again.In other words, ammo.