Dr. Thomas Hope was also a kid genius and attended the same schools as Dr. Callaghan. Although the competition between them for Valedictorian was intense, he and Dr. Callaghan became best friends and likely drove one another to be better than they would have on their own.
Dr. Hope and Dr. Callaghan also served in the military together. If the CO did not specify Tom or Thomas, the other would perform the order. That did not sit well with the CO...and usually did not end well for them, either.
Dr. Hope is the Medical Director at Colossal Emergency. At the behest of Dr. Callaghan, and just as begrudgingly, Dr. Hope assembled a covert medical team to help the heroes of Colossal…and it may have been just in time, too.