In the sect, yes. There was only one person I called "older brother," but everyone else was "little brother" or "little sister." [ He laughs a little before letting out a little sigh. And for the sake of what he's saying, it's easiest to put it that way rather than explain all the naming schemes within the sect.

Besides, there is a much more important thing to say. ]

Family isn't always the one that you are born with but the one that you find.

[ Hearing her longing to have a big family, he can't help but want to offer her the small hope that something like that is not impossible. She could find her own family -- certainly, there will be people who would love to call her "big sister." ]