Up Air

Byleth's Up Air is a strong juggle tool, as well as a combo tool. Due to it's large size and long, lingering hitbox, it is exceptional at keeping an opponent in the air. It can be used to pressure platforms, both with a shff uair or a FH ff uair. FH ff uair can land on some platforms, such as Battlefield's platforms, and can be used to catch jumps out of shield and start a combo.

Up air can combo into many things, but most notable is itself, Nair, Usmash, and Up-b.