"Spirits, all the time," Sokka sighs, exasperated after forty years and tugging on Ursa's hand right back. "Long before your mommy and her siblings were born, Mel and Zuko wouldn't talk about all kinds of things. So they'd get into these huge fights and run off on each other and as soon as they'd finally have a conversation, everything would be fine. But they'd have to be kicked into it first."