Firo was able to turn and dodge faster than Motoyasu could thrust. Maybe thanks to the curse, Motoyasu's movements are considerably fast. No, I have a feeling it's not just that. He's even faster than Ren. Not that he wouldn't be able to keep up at all, but I doubt he'd be able to catch up.
"Firo-tan! Meteor Spear!" (Motoyasu)
Bashii! Motoyasu fired his skill aimed at Firo.
"Nnnngghhhhh!" (Firo)
Firo dodged Motoyasu's Meteor Spear by a paper-thin margin and kicked Motoyasu's chest.
"Gu...Firo-tan's kick, I'm so happy..." (Motoyasu)