Taako, well... he's actually on a personal mission when he goes to talk to Reira, even though he's only vaguely aware of who she even is. Foster doesn't ask Taako to do things often, so when he does, those requests are taken seriously, as weird as they may seem. Returning a bird to a little girl shouldn't be that hard, right?

He knocks at the door, calling out: "Hey, uh, Reira? Are you in there, darling?"