Caven (Anime)

Caven (カーフェン) is a mysterious adversary of the Scout Regiment and ally to Kenny Ackermann.

Appearance
She appears to be a young woman with a fit, thin build. She often holds a calm, almost sad expression. Her blonde hair is just a little bit past shoulder length which she usually kept tied back with bangs that are parted down the middle. She is seen, like the others in the squad, wearing a pair of tight black pants, a white button-up shirt, and a pair of black shoes

The Uprising arc
Tasked with bringing Eren Jaeger and Historia Reiss to King Fritz, Caven and Kenny begin staking out the cottage that Levi's squad is staying in, and the experiments conducted on Eren's Titan form.

The two watch as the Military Police unsuccessfully attempt to raid the cottage and detain its occupants, with Kenny commenting that Levi was able to mobilize his subordinates fast enough to avoid capture because of his training.