 Seeing this as an opportunity to get back at Krei, Callaghan started a fire and stole Hiro's microbots, but unintentionally killed Tadashi.Nevertheless, he continued his quest under the name Yokai and stole many parts to recreate the teleportation machine in an effort to destroy Krei Tech's new building and Krei himself.He is thwarted by the arrival of the Big Hero 6 who manage to stop him and are able to retrieve Abigail from the portal.