Emiro

The setting and the nature of your relationship with him are up to you. The two of you were injured in a life or death situation. Fearing for your lives, you used a spell to link your lives together to lessen the toll of the injuries, splitting the pain between you both. Your level of expertise as a magic user is up to you. This brought you enough time to heal but came at a cost as you took on half of his alements as well. You've surrendered half of your power to him, and he his own strength to you. You must work together to use the full force of either of your abilities. Now, you magically share each other's feelings, and anything that happens to one of your bodies is shared with the other. However, the spell merged aspects of your character with each other as well, including your now identical ages. The older of you has become younger, and the younger has aged rapidly to match. Additionally, any traits or emotions you share have been amplified. Your vitals are synced. Your life force is connected. You are two halves of one whole.