Earth-3: Eddie Thawne
On this Earth Eddie Thawne is a hero by the name of Cobalt Blue. He’s essentially the Barry of Earth-3 as he is the second public heroic Speedster. Defends Keystone City while Jay Garrick defends Central City. They share a Rogues Gallery which is led by Joe West who on Earth 3 is Captain Cold. Though they do have separate enemies. Which for Eddie is Johnny Quick, Blacksmith and Solovar.
Jay Garrick and Eddie Thawne have a father-son like relationship due to the former having no children of his own while the latter’s father died when he was young. So Eddie looks up to him the same way Barry of Earth-1 looks at Joe. Especially since Jay had taught him what it means to be a speedster and Jesse helped out whenever she’s around. Though he is unaware that there are other Earths.
Like Barry on Earth-One and Hunter Zolomon in Earth-Two he was struck by Lightning on a stormy night and as a result was stuck in a coma for nine months. Jay Garrick having heard of the man’s predicament he had visited him in the hospital where he had met Eddie’s mother, Joan Thawne.
E3 Eddie’s arch enemy is Johnny Quick who like him is a speedster. Johnny had eventually figured out his identity and targeted his mother Joan and killed her in cold blood. He doesn’t kill Johnny out of respect of Jay who had figured out that Johnny is a by product of his one night stand with Nora on this Earth.
E3! Eddie in terms of skills as a speedster while he is significantly faster then Jay and has great skill over using his lightning and creating wind funnels/twisters. He is not capable of time traveling or dimensional traveling or anything related to those. Though unlike most speedsters he can absorb the velocity from objects to temporally increase his own speed for a short time. His lightning is bright yellow.
In one event he had teamed up with other heroes from an attack by the Gods of New Genesis.