Kanto is a villain in the Superman media serving under Darkseid. He was sent to Earth by Darkseid to supply greedy criminals Apokolipitan weapons. Mannheim was suspicious about Kanto giving them free weapons. Kanto introduced his boss to Mannheim when the latter followed him to Apokolips.

In the comics, he often wears the clothing and personality of a nobility-bound medieval European assassin.

Amalgam Comics

In the Amalgam universe, Kanto surprisingly had the same name when he served under Thanoseid. But his origin in this case had aspects of Validus, when it was revealed that he was the time-lost son of the Steve Trevor/Frank Castle fusion and the Amalgam version of Princess Diana, who in Amalgam lost out on being Wonder Woman to her adopted sister, Ororo Munroe, normally Storm. Thanoseid had raised him not only as an assassin but as a trap, hoping to one day trick his parents into killing him. This effort failed, and this version of Kanto indicated he might join his parents' side one day.

Kanto JLU

Kanto in Justice League Unlimited