Well, before going to bed i guess i'll give my opinion for this match.
Kotori can literally One Shot WQ, the healing bullet is useless, but she has no real ranged attack if not Meggido, when WQ can attacks from a distance, Reversal Causality should help but iirc, Kotori can tank her own fire attacks so probably not the best idea, so i can see WQ use her sword to spatially cut Kotori, if she notice that the opponent can regen from blow, she would probably cut her head from a distance, or using her void bullet.
WQ also have way to avoid Kotori's attack with the Cancer bullet that warp space to cahnge the direction of attacks. Kotori's chance is using spacequake but this can also be reversal'd.
I can see WQ having the upper advantage in the fight so i guess she take this.