Speedsters

There's two main categories of speedsters: Timbenders and Bodybenders.

A timebender, as the name implies, bends time. When a timebender goes fast, they change the tick rate on their personal clock. From a timebender's perspective, everyone and everything else is moving slowly. If a pure timebender runs a mile to the store, it may take a fraction of a second in real time... but the timebender still feels the full run, and will be exactly as tired after the run as if they didn't use their powers. It's very good because the speedster gets all the reaction time they need and can figure things out as they go along.

The second main category is the bodybender. The body is accelerated. This leads to fast healing, fatigue recovery, and many other benefits relative to a timebender. However: A bodybender's brain doesn't entirely keep up, and this form of speedster must plan out their actions... which leads to problems when something isn't as expected.

Most are, however a hybrid between the two, woth elements of both.