Chirp was amused greatly by her friends power, but most things amused her these days. The fight was rough on the body, so she enhanced the size of its lungs, letting her take in more air as she ducked away from one of the whales odd clawed hands. To expand her lungs she had to destroy what was left of the liver and intestines, cannibalizing one of the kidneys for extra space as well and using those bits of flesh to reinforce the legs and neck again.
It was second nature to her by now, changing her shape as easily as other people breathed, so it wouldn't hinder her in a fight. She felt unusually fast and corrected for it, the processing parts of her brain going so fast she had to pause for a moment to think of cooling options to avoid overheating. Her tongue felt more normal as well, she glanced up at the man, doing her best to do a frown with a wolfs face. She assumed it was him, because who else would it be? She gave a sort of grin, the flesh reknitting as fast as the acid could dissolve it.
She appreciated the assist. Chirp wasn't exactly "combat-centric", she preferred literally anything else. But that didn't mean she couldn't have a good time doing it. With her increased strength she pressed in on the creature, it was getting desperate, lashing out more aggressively, trying to keep them off. She briefly sympathized then resumed her attack, tearing into the beasts fleshy flank, ducking back under its bulk as her ally summoned arrows to impale it.
The whale made an awful bellowing noise and Chirps ears went flat against her skull, it began to thrash and the changeling found herself knocked aside briefly. So she bit at it hands.
Getting up was a struggle, but she did it, growling low now and facing the beast. It was an odd sight, a wolf versus a mini-whale about the same size. With a leap, still stronger than what she expected (thanks Sunobi), she was able to clear its height, landing on its back, scrabbling at the top of where its spine should be, tearing with claws and teeth, trying to keep biting it until it stopped moving.