Jai West

Jai West is the son of Wally West and Iris West's twin brother.

History
He was born stillborn due to Zoom attacking his mother, Linda Park-West. Wally West, his father, traveled back in time while fighting Zoom and pushed him into his own blast, causing what the doctor's called "spontaneous pregnancy" in the present-day timeline. This revived Jai and his sister Iris. They were born happy and healthy. Jai is named after the original Flash, Jay Garrick.

Shortly after, during the Infinite Crisis, Wally West was drawn into the speed force while fighting Superboy-Prime. But before he went into the speed force he returned home to say goodbye to Linda, who grabbed hold of him while holding Iris and Jai and all four West's were sucked into the speed force. Conversely, thanks to a key Linda was holding from the planet Savoth, the four of them actually ended up traveling to the planet Savoth, where the family was able to stay. The speed force had altered Jai and Iris’ genetic make-up and shortly after arriving on Savoth they began to age rapidly, eventually stabilizing when Jai was roughly 8 physically and Iris was 10 physically. The kids also developed powers, with Iris having the ability to vibrate her molecules through solid objects and Jai having the ability to accelerate the growth of his muscle tissue.

During The Flash Rebirth, Barry Allen returns and Jai eventually loses his linking to the Speed Force. Because of Jai and his sister's bond only one of them can have a linking to the Speed Force or they both suffer significant amounts of pain. In a frantic attempt to save her brother from the pain, Iris takes the full blunt of the Speed Force herself. This causes Jai to lose all of his powers, while Iris gains complete control, becoming the next speedster generation. Following this, Jai has lost his link to the speed force and has begun a pursuit to master every video game he can get his hands on.

Powers
Super Speed: Currently, this speed only manifests itself as the ability to temporarily accelerate the growth of his muscles, allowing him also super strength.

Once, while emotionally distressed, dormant DNA in Jai's cells vibrated, causing strange transformations.

Mind-Link: Jai can sync his Speed Force aura with his father's, causing him to fly behind Wally when Wally thinks of him. This power works in reverse, allowing Jai to summon Wally.

Quotes :

 * Dad's actually awake? Well, thank Superman! I'm starving!