Metal Lee

is a shinobi of Konohagakure's Lee Clan.

Personality
Lee is a hot-blooded and dedicated shinobi, much like his father Rock Lee and his father's sensei, depicted when he was seen participating in his father's gruesome training regime.

Appearance
Lee bears a stark resemblance to his father with his dark eyes, black bowl-style hair cut, and bushy brows. However, his eyes are noticeably sharper. His likeness is further perpetuated by his attire; he wears a green jumpsuit with orange leg and neck warmer and bandages over his hands.

Abilities
Like his father, Lee appears to specialise in taijutsu. He's shown great stamina and strength, keeping up with his father's training and capable of repelling a puppet into a wall with a single kick.

Epilogue
During the day of the Kage Summit in Konoha, Lee was rigorously training with his father. As his father emphatically told him that he was in the springtime of his youth, the young man echoes his father's words.

Boruto: Naruto the Movie
Metal Lee makes an appearance in this film.