"In the Aeneid, Achates (Ancient Greek: Ἀχάτης, "good, faithful Achates", fidus Achates as he was called) was a close friend of Aeneas; his name became a by-word for a very intimate companion." - (en.wikipedia.org 27.01.2022)
en
(The left column lists the relations of this actor to objects in the right column. In the middle you find other actors in relation to the same objects.)