Charlene could not help herself, she laughed at Otter's name. Not because she was feeling mean but just because it happened that easily and she did not know this human so hurting his feelings did not actually matter to her. Most people would think that terrible but, well, Charlene was a mermaid from a pod with a very low view of humans. It was natural for her. "Why are you called Otter?" That could be possibly even more amusing than his actual name. Reasons for things like that almost always were.
Her curiosity was peaked at the mention of something alive being in the bag. No way would she pass up the chance to see what Otter had in that bag, even if she had no idea what it might be. "Sure." Maybe it was a pet of some kind, a lot of humans seemed quite fond of things like that. Charlene herself was not sure she understood their purpose all of the way, other than being cute... and that was purpose enough. She had a weakness for cute things.