Moonspear Second, don't you tell me what you think that I can be

Hydra wanted to learn from the best what was right and what was wrong, and what to do in these situations. The baser part of Hydra strongly disliked the presence of other children here but she could not understand why. It did not effect her, personally—but it effected something, somehow, and she felt discontent by it. The cub seemed not to understand what they wanted of him, and when the boy let out a play growl Hydra let out a very real growl and stepped forward as though to say, no—this is not what are asking of you, her expression dark and severe. 

When her father acted, Hydra quieted and was watchful. What Charon did felt right within her core, though Hydra's reactions when annoyed or aggravated always bordered on extreme. If what he did was that was not something she cared about; the boy needed to learn, and this was how Hydra would teach, too.