Sorry if this is too long, but I wanted to develop a personality for this guy:
Aquatrain
Modes:Submarine/Steam Engine/Robot
Motto:A war should never come between friends
Bio:Just like the friendships held by Starscream and Skyfire and Omega Supreme and the Constructicons, both Aquatrain and Astrotrain were once friends before the war, racing on Cybertron. When they had to choose sides however, Astrotrain chose the Decepticon cause due to false promises given to him by Megatron, and even tried to convince his friend to join, but Aquatrain was a pacifist, and knew Megatron would just melt him down for spare parts, so he joined the Autobots. On Earth he scanned a Submarine to study aquatic life, but shortly after he saw Astrotrain in battle he scanned a Train as an additional mode to remind him of the good times he and his friend have had together. He still tries to recruit Astrotrian to the Autobots, and Astrotrain doing the same for the Decpeticons, but both have no success. Even though they are on opposing sides, they secretly meet up to race each other for old times sake and still retain thier friendship.Astrotrain even offered Aquatrain a postion as second in command of the Astroforce.