Viper

​Viper was the attempt to recreate what happened with Echo. However the scientists couldn’t recreate the perfect harmony between animal and human. As the snakes gained sentience from Viper they came to hate him.

Because Echo was the ideal he was created after he is very vengeful towards Echo and often starts physical confrontations with her.

Viper and his snakes do not get along. They hate him and constantly attack, bite and try to strangle him, hence why he always has a nose bleed and a migraine. Just another reason why he’s so bitter towards Echo.