Owner
Definition 1 of 3
Pro Tip 1/3
Ownership Implication
Using 'owner' implies the person has legal rights and control over the item. The new phone's owner wasn't worried about theft, as they had all the paperwork.
Pro Tip 2/3
Possession vs. Ownership
'Owner' means actually having ownership, which is more than just having something with you. He found a lost wallet, but he isn't the wallet's owner.
Pro Tip 3/3
Pride Connotation
When calling someone an owner, it often suggests pride and responsibility for the owned thing. The car owner waxed his vintage vehicle with a smile.