Board Thread:Episode Discussion/@comment-4141313-20181208003742/@comment-4010415-20181216000907

The only thing we know for certain (meaning: absolute confirmation) about Tock's Semblance is that it lets her be invulnerable for 60 seconds.

She really could be a fragile speedster like SYUTK says, needing to dodge and block attacks, rather than tank them.

Though, we do also know that she didn't start with 100% Aura during that fight, considering the Nevermore smacked her across the ground, but even still, that's not much Aura lost, no matter how hard that rocky ground is. She may or may not have used her Aura on the gravity Dust in her kamas. Hell, maybe the whole purpose of her putting switches to activate the Dust is so that she doesn't have to use as much of what precious little amount of Aura that she's able to have.