Seemed like a pretty bad idea from the start... Rerouting stuff is tricky enough and can have dangerous consequences, but intentionally breaking them's never a smart thing to do.

Especially something like this...

[Wait.]

[Wait, wait!]

Appa the sky bison...? Ah! You mean Aang is your grandfather? But he...

[But he's just a little boy. Here anyway. Ginji rubs the back of his head and adds sheepishly:]

...W-wow. If he's as old as you're saying, he must've aged really well.