Tartaglia is his real name, and he also has nicknames like "Ajax" and "Child."

Child is a fairly calm and smiling person who is able to quickly get involved in any job.
He is not very emotional and impressionable, so he almost never had problems like attachment to ordinary people, despite the fact that he can easily pick up a conversation with a stranger and spend an extra couple of minutes with him.
Ajax can be more than described as an extrovert. He is a sociable and quite charming young man.