myrmidon

noun – oxford languages – a follower or subordinate of a powerful person, typically one who is unscrupulous or carries out orders unquestioningly.

capitalized – merriam-webster – a member of a legendary Thessalian people who accompanied their king Achilles in the Trojan War.
: a loyal follower;
especially, a subordinate who executes orders unquestioningly or unscrupulously.