He hears the 'henshin!' and his eyes go wide. Moving by pure reflex, he jerks to the side in time to narrowly avoid getting swiped by the projection of energy. But that dodge takes him closer to the approaching, maliciously inquisitive Darkroaches... so he once again acts on reflex and throws his hand out towards it, throwing out a burst of psychic force that ought to knock it off its buggy feet.

He's not going to change, not going to change yet, not until it's absolutely necessary. He hates that form...