Personality

Brainiac 5 is usually portrayed as being anti-social and cold towards others.

Modern

Brainiac 5 in the most recent rendition of the Legion of superheros is a major player. Early on Brainiac 5 comes into conflict with Legion leader Cosmic boy about the way he has been leading the team and some actions he has taken against himself and other Legion teammates.

Brainiac 5 also differently from earlier renditions of the character develops a close relationship with Dream Girl. At first it is a an anger towards her powers and their unpredictability, but it develops into a close relationship and Brainiac 5 shows true caring. Brainiac 5 is visited by Lemnos a space criminal who has the power to make you forget him completely. Brainiac 5 doing just to his name sends himself a picture of Lemnos so that he never forget his face.

Brainiac 5 then takes a team of Legionnaires to his home planet of Colu upon their arrival something is very wrong. All of the Coluans have had their brains erased... Brainiac 5s entire race has been turned stupid. Brainiac 5 visits his mother only to find her mind has been wiped as well. A monster attacks and during this attack Brainiac 5 discovers the true cause of the genocide of his race... Lemnos. Brainiac 5 sees his face and remembers their entire encounter the first time. Lemnos escapes for now.

Brainiac 5 after broadcasting a conversation between Cosmic Boy and Sun Boy causes a fight between The Legionnaire's on his side and Cosmic Boys squad. Cosmic Boy is called back to his home planet and Brainiac 5 assumes leadership of the Legion. Before Cosmic Boy can get their Terra Firma attack Helegyn and Cosmic Boy returns to the Legion to help defeat Terra Firma and capture Elysion. Brainiac 5 accepts this and they move forward as allies.

Just when things could not get any worse for Brainiac 5. Elysion escapes after a series of suicide bombers and using his ground shifting powers brings down Legion Tower on the person he is closest to Dream Girl is killed. Brainiac 5 recovers her body and puts it in stasis. Brainiac 5 also manages to teleport all the Legionnaire's home from different worlds and capture Lemnos the criminal behind the entire plot, placing him in stasis as well and trying to use him to bring Dream Girl back to life.

Powers

Brainiac 5 is a 12th level intelligence after the intelligence genocide of his fellow Coluans Brainiac 5 is one of the smartest people in the universe. Able to predict events using complex data calculations. Also able to create very advance tech. i.e. Time Machines, Legion Rings, Force Shield.

Brainiacs personnel force field is nearly impenetrable when it is active not a lot can get through to hurt Brainiac 5. This in combination with his Legion Rings flight makes him a very formidable foe. Brainiac 5 prefers to calculate, form strategies and plans, brute force is beneath him.