Overwatch - Do you... hear that melody?

Tracer, the chick, once had a sort of time-travelling accident. Since then, she need to wear a special harness on her chest, or else she started quite literally drifting off from this timeline like a ghost.

Sigm, the melody dude, a had a similar thing happen to him, instead with space and not time, which left him a little… looney.

The comic highlight their similar backstory.