Shalltear's Speed

[TheOneBelowAll123]

In overlord volume 3 Shaltear attacks Ainz so fast she leaves a trail of heat behind her.

https://i.imgur.com/plYTqdf.png

I have no idea how fast that feat whould make her.

 

[HeCatThunderMan]

"The vacuum in the kick's passing sliced off several of his hairs" It states this just after the feat you refered to. In order to kick fast enough to make a vacuum behind her leg, she would need a ridiculous amount of combat speed. Since a perfect vacuum is near impossible if not completely, most every physicist would assume and consider anything less than 1% STP can be considered a vaccum. Meaning her leg at absolute bare minimun would have to be traveling 2000 m/s, roughly 4474 mph or Mach 5.83. Thats Hypersonic.