A person who accompanies another is typically referred to as a companion. This term can denote someone who provides company, support, or assistance in various contexts, such as social situations, travel, or caregiving. Additionally, specific roles may include terms like escort or chaperone, depending on the situation.
Bodyguard, Protector, Preventer.
pandiculation
slave
a slave
A person from another country is typically called a foreigner or an international person.
Understudy
Cheater
They are known as an ACCOMPLICE.
A call originator is the person placing a call to another subscriber on a telephone network.
When a person is namedafter another or has the same name as another person we call him/her namesake. The origin is probably the idea of "a person named for the sake of another".
A cannibal.
a minority??