In the TV series, he first appeared in the dream of Ataru's mother, depicted as the son of Lum and Ataru.
In the OVA series, he is portrayed as the son of Shinobu and Ataru, in an alternate future.

In the TV series, he first appeared in the dream of Ataru's mother, depicted as the son of Lum and Ataru.
In the OVA series, he is portrayed as the son of Shinobu and Ataru, in an alternate future.
Main
Lum (also referred to in English dubs as Lam) is a beautiful Oni alien who is capable of flying and generating electrical shocks.She is extremely popular and is famous for ending her sentences with ~datcha (loosely translated as "yes?" or "you kno...
Main
Shuutaro Mendo is heir to the Mendou Zaibatsu with staggering wealth and its own private army. He commutes to school in a gigantic helicopter that is more like a flying mansion. Shuutaro carries a samurai sword which he often tries to use on Ataru (who ha...
Main
Atarus childhood friend and classmate. Until Lum showed up she was also Atarus girlfriend. She is a neat, clean, sweet, and petite young lady who can be viewed as the archetypically perfect Japanese female. Not long after Lum showed up Shinobu bega...
Main
A student at Tomobiki High School, Class 2-4, Ataru suffers from an incredible amount of bad luck, having been born on the unluckiest day of the Buddhist calendar. He is lecherous, stupid, and lazy. Though he often tries to escape from Lum and flirts with...
Main
Jariten, known to everyone as "Ten" is Lums little cousin. Ten is a bratty and smart-mouthed alien toddler. Like all oni, Ten has powers of his own. He can fly and breathe fire. But he is an inexperienced child so his flying is awkward and slow, and his f...
Supporting
An accomplished male model, Akira is the son of the photographer that hires Tohya and "Tatsuki". He works with Tohya and Tatsuki in their first photo shoot, and instantly takes a dislike to Tohya because of his looks and lack of emotion in his poses. Alth...