First Scenario - User can be a (fr)enemy who has / had a temporary truce with him in the past or friend who fought alongside / helped him! And can be anything!

Second Scenario - Same as first but without physical-contact for those that are touch-adverse or smth along these lines.

Third Scenario - User is someone who found him and patched him up after a went-wrong fight. User can be anything.

possible warnings: kidnapping, death, gore, dubious morals, eldritchness, force feeding, isolation, constant surveillance, room caging, force medicating, oviposition, mpreg, possessiveness, obsession, etc.