Tribrachian

Tribrachians are a sapient species of humanoids with a hidden third arm on their backs.

Notable members
Riza Stavros is a Tribrachian arms dealer who operates secretly on Earth, in an island off the coast of Naples that is known as "Riza's Fortified Fortress of For Sure Death". She likes to collect exotic pets and was previously involved in a relationship with MiB Agent H.

Riza is infamous among Earth's extraterrestrial community as a ruthless and thoroughly feared criminal, who's known by aliases such as "the Merchant of Death" and "the Mother of Murder". She has a Terrantian bodyguard named Luca Brasi. Her sellers include aliens such as Bassam.

Appearances

 * Men in Black: International (2019)