Reciprocity

Reciprocity is a skill introduced in Fire Emblem Fates. It is the personal skill of Kaden.

Fire Emblem Fates
If Kaden is healed by a staff/rod, half of the health that healed him will also be given to the healer. This personal skill is similar to Live to Serve (which heals the healer by the same amount of how much they healed another unit).