That Roman Dude
Roman-era blacksmith turned soldier. No special powers or abilities beyond human limits.
Picture source: Wikipedia
Picked up by the Hero Kids on an accidental time travel incident to jolly old pre-england. He now lives on the grounds of the school, in a small shack, and is convinced that Eve is a giantess and that Vivica is a visiting dignitary. He has also taught Rio how to smith to the best of his ability. (He may be insane.)