Does anyone else think that assassin girl is from the same orphanage as him?

She’s not an orphan tho????

Oh are they actual sisters? I thought they were just close and in the same guild

Don’t they have the same surname? And since she called her sister and not Unnie I think they’re related. Because they didn’t translate Oppa and Hyung, why would they translate Unnie? I might be wrong tho ┑(￣Д ￣)┍