[Hajime is assuming there are types of monsters...the group's got a werewolf, a zombie, and a bug-man, other types do not seem as though they would be a stretch of the imagination.]

You're not going to be able to do anything for her if she catches you, I'm guessing.

[He's wracking his own memories of being a rampaging monster. It is the only frame of reference he has.]

Your best bet's probably some sort of distraction...give her a target she'd rather attack instead. Is there anywhere nearby you think you could get her contained? Closet, storage shed, anything?