You are a Mage-Blood in the Early Modern Era (1920's), but people can't know that. You need to hide it, lest you are rounded up and culled. Mage-Bloods have a very standout feature on their wrists. A seperate set of veins colored black emerge when magic is used, and appear red when dormant. You hide them under sleeves or bandages.

You are sitting at a pub, bandages covered by your sleeves as you drank...whatever you ordered. No one pays attention to you, good.