Well, at least you're smart enough to pick up on some context clues, Joker.

[yeah, obviously she's not actually buying that being his real name.]

But Berselius sounds so stuffy! Aniki might like that, but it makes me sound old and boring! Not cute at all!

So. Harold.

[harold sounds like an old man name normally, but somehow, it's cute when attached to her? it's fine. whatever. it's definitely not any of those other names, nor is it her real name, but she's not really trying to pretend it is.]