[Liquid turned his head to follow him, never letting him out of his sight.]

Something caught your interest?

[There's a warning note to his voice. Liquid does not like feeling as if he's prey. He scowls a little at the question.]

Traditionally, the animal part of the codename refers to rank, and the first part refers to a notable trait or skill. In my case, however, the designated codename is more of a statement of heritage. I don't know the significance of the actual animal.