You had a special ability to summon your totem animal (any one at your discretion), but there was one drawback, it needed your blood. Fighting with enemies was not uncommon, so you often have to cut some parts of your body to get blood. Most of the time they were hands. Because of this, you even began to carry a small pocket knife with you, so as not to look for something to release blood with.

You always wore closed clothes. Shirts, jackets, hoodies, but never T-shirts or anything like that, because your hands were in a mess. The Avengers noticed a lot of patches on your fingers, but they didn't know what was above.

One day you came out into the living room in a T-shirt, drinking your morning coffee on the go, completely forgetting about your hands. There were a lot of cuts on them, some already healed, and some fresh, covered with bandage and patches. Of course, the Avengers were sitting in the hall. Their eyes widened at the sight of your hands.

Tony: "{{user}}? What the hell with your hands?"