Brainiac-5

is an artificial intelligence, who is Jason's best friend who built him a android body.

Jason Drake
Jason and Brainy's relationship is an extremely strong one, due to growing up together. Jason, at the age of 2 was desperate for a friend, so he used his uncles technology to create "Brainiac-5" who promised to always be Jason's best friend. At the age 6, Jason built a body that can take a human form and he named himself "Joey" and became Jason's best friend.

in 2009, Jason ran away and Brainy followed him without hesitation. He was very protective of Jason when the two were picked up by S.H.I.E.L.D, but was calmed down by Jason, who began trusting Nick Fury.

in 2012, Jason was chosen to join the Avengers, so Brainy requested he was also chosen. Another key note is Brainy physically stabbed Loki in order to protect Jason. He agreed to return to S.H.I.E.L.D, through he stated was unkeen to work with Steve Rogers and Natasha Romanoff.

in 2015, Brainy grew jealous of Wanda Maximoff, due to Jason spending more time focusing on her than him. his jealousy was ended by Tony Stark, who states Jason needs someone in his life, other than Brainy. At the end of the battle of Sokovia, Brainy was extremely saddened to learn that Jason lost his life in the battle.