Tommy Kwan and his girlfriend, Gale Yee, were on the San Francisco cable car struck by the Jumpstart effect.[1] Like all the victims of the accident, Tommy Kwan developed Ultra potential, but his abilities did not manifest for several months. Tommy was killed by a local gang in Chinatown.

Somehow, his consciousness survived after his death by possessing the chalk outline the coroner's office drew around his corpse. As an insubstantial spirit of vengeance, Tommy Kwan became "Chalk," seeking revenge on the gang members who killed him.[2]

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  1. Behind-the-scenes in Strangers #1
  2. Night Man #10

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