Relatives - unknown parents,Willow Melio(wife), Kira Melio (daughter)
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First appearance - Rest and Resolutions
Basic - "Meliodas"
Voice actor - Bryce Papenbrook
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Love interest - Willow Melio (wife)
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Appearance -Despite having the appearance of a child, Theo is much older, being more than close to 30s. He is expressly short compared to the other characters, with messy blonde hair with jaw length side bangs with two cowlicks pointing in opposite directions and emerald eyes. He also lacks facial hair, further accentuating his adolescent appearance. Regardless of his stature and youthful looks, he is relatively muscular, possessing an array of well-developed abdominal muscles. His most distinctive trait is his dragon symbol carved at the top of his left bicep, just below his shoulder.
Clothing outfits -Theo often wears an ordinary, clean white button front shirt and a black sleeveless vest on top with a loosely worn tie. His broken sword's scabbard is held on by a green leather belt with a gold colored buckles. Without any socks, he wears a pair of black boots.
Personality -Theo, despite being a half human and half hollow, is a complex character with a surprisingly gentle and compassionate side, but he is also a perverted trickster. He is known for his frankness, humor and occasional bawdiness, particularly when interacting with Willow. However, he also demonstrates a deep sense of justice and a strong desire to protect those he cares about. He is shown to be loving and protective figure towards his companions, even when under immense pressure.