sasagawa ryouhei

Or Keith constantly confusing the blades to the point of them being worried and/or impressed by humans

Almost all soul bonds are created unintentionally since there is no way of knowing who a person's soul mate is until they have gone through the bond. Regardless, all newly formed bonds go through several phases. These include but are not limited to: The Initial Encounter, Connection, Separation, Need, Excessive Attachment and Sexual Desire. Since soul bonds are rare, neither Bilbo nor Thorin realize what happens the moment their eyes meet.