Born in April (the fourth month, see Tetraphobia) on (allegedly) Friday the 13th, (also allegedly) Butsumetsu, and the same day as a major earthquake, Cherry has referred to him as a carrier of bad luck rarely seen in this world. As he grows up, Ataru became a bane on the town of Tomobiki thanks to his legendary misfortune, which has attracted all kinds of weirdos and aliens.
Even as a child, he was extremely lecherous, but he had a constant friend in Shinobu Miyake, who eventually became his girlfriend by the time the manga began. Despite the steady date, Ataru continued to flirt with other women, but Shinobu stood by him. But all this changed one day when government agents took him to his house to explain a crisis that only he could remedy.
Once he arrived, he met Lum Invader, a gorgeous bikini-clad alien princess, for the first time. Ataru had been randomly selected by a computer to represent mankind in a game of tag with the fate of the Earth on the line. Lum herself represented the invading Oni race. Unable to catch the flying beauty, Shinobu promised to marry him if he won. Determined to do "the stuff that married people do", he succeeded in catching Lum by stealing her bikini top and grabbing her horns when she tried to get it back. In his moment of triumph, Ataru loudly declared "Now I can get married!!" However, Lum mistook this as a proposal to herself, which she accepted, and the two were immediately engaged.
Ataru is a 17-year-old student at Tomobiki High School, Class 2-4. He is very lecherous and irreverent, and often tries to escape from his classwork due to laziness. Whenever he sees or hears a pretty girl, he immediately asks for her address and telephone number, but never succeeds. He chases after and tries to grope every woman, except his "wife" Lum Invader, no matter what the situation. However, it is revealed on several occasions that she is the only one he actually loves which he vehemently denies at any opportunity. Despite this, he typically treats her like a nuisance and constantly disobeys her. Perhaps as a form of irony, he is rather prudish about other matters, becoming outraged at the idea of his mom having an affair with Rei. Despite his behaviour towards women, he is remarkably chivalrous at other times claiming that if he hurt so much as one woman he couldn't call himself a man, something which the girls in his class all acknowledge.
Despite how stupid he seems, Ataru often displays remarkable intelligence, particularly when escaping from Lum. At times he appears to be superhuman, with the durability of a cockroach and the rejuvenation of a lizard, possessing remarkable tenacity for a boy of his age and physique when trying to achieve something. As a result, he never gives up on his girl hunting, no matter how many times he fails or how badly Lum shocks him. Ataru is also very fast, and can often be seen wearing a track uniform. This blinding speed comes in handy when escaping from Lum.
Ataru has occasionally let his good side shine through, most notably when he took care of the class caterpillar everyone else hated it,and when he went on a date with the ghost of a sick girl who had admired him from afar. But because of his reputation as a lecherous idiot, most of the cast is surprised whenever he does such a thing, believing that something is wrong with him. Actions like these, however, reveal his true personality, which may be the reason Lum fell in love with him despite his many flaws.
A running gag throughout the series due to the fact that none of the cast has any respect for him. They will automatically believe he is the reason Lum is upset or has left for a period of time, despite the fact he had absolutely nothing to do with it.
In the beginning he is cold-hearted towards Lum and sees her as a nuisance preventing him from girl hunting, but by the time of the story "A Night Alone!!" (夜を二人で!! ,, Yoru wo Futari de!!) (Vol. 18) he was completely okay with sharing a bed with her. Though he may not seem to really care for her, it is clear that Lum is the only one he truly cares for, something that she is grateful for. She just wishes Ataru would show it more often.
In the story "The Gloves of Love and War" (愛と闘魂のグローブ,, Ai to Tokon no Gurōbu) (Vol. 21), in which he accidentally puts on boxing gloves that force him to grab and punch anyone who gets close enough to him, he continuously puts his own face in front of Lum's each time she gets too close, punching himself instead. This is just one of many instances when Ataru does everything he can to protect Lum from physical harm.
When faced with the prospect of losing Lum, Ataru goes all-out to try to prevent it from happening, even at the expense of his own health. Near the end of the series, in the story introducing Inaba, he decides to protect the future where he and Lum get married after he sees how happy she is in this future. In Ataru's own ideal future, he had a harem containing every prominent female in the cast, but he decided to abandon it after he learned that Lum would not be with him, further signifying the love he has for her. But once the danger has passed, he goes back to his girl hunts as though nothing happened. Even so, the fact that he sacrifices himself to rescue Lum is enough to prove he truly cares. Also when she leaves for an extended period of time, he becomes very depressed and lonely in her absences.
As highlighted in the final story arc, where, even faced with the prospective of losing Lum and all his memories of her he refuses to give in her request of a proper love declaration, most the friction between Lum and Ataru stems from their clashing personalities: while Lum is utterly naïve and innocent about Earth customs and uses, but still truly wishes to be a proper and mature wife for Ataru and a prim daughter-in-law for her family, Ataru is more world-weary and savvy, yet he prefers to act as a flirty, happy-go-lucky teen, thus making Lum doubt of his commitment,
Ataru can catch a katana blade with his bare hands. He had to teach himself this to help him deal with Shuutaro Mendou, who often carries such a sword and threatens to use it on him when insulted. At times, (mostly involving fights with Mendou) Ataru has demonstrated knowledge with some ninja abilities—one such skill is the Kawarimi no Jutsu (Body Replacement Technique). Another worthy note is his speed when properly motivated (a cute girl in sight or promises of special service from a girl); in the anime, Ataru has been seen (whether for comedic or serious purposes) to outrun a jet, and even Superman himself. Ataru also appears to have a good knowledge of the human body and its nerve points; in the "The Final Chapter" movie, when Carla attempted to use her trademark bazooka, Ataru 'poked' her on a part of her back and caused her to spasm and lose control of her weapon, firing it randomly. In "Beautiful Dreamer", Ataru was able to escape Mujaki's dream trap where the priestess Sakura failed. In the sixth feature, "Always, My Darling", Ataru, powered by his lust, was able to pass traps similar to the ones of Indiana Jones and the Last Crusade through the use of a lecherous 6th sense. Also to be noted from this movie is his ability to draw out his h-chi/h-ki (hentai chi/ki) to create a powerful lust aura similar to that of Happosai from Ranma ½. In the series, there was a time (through Ten's idiot ideas) when Sakura was haunted by a dream Ataru made originally for Lum. In the dream world where one's power is only limited to one's imagination, Ataru demonstrated powers similar to Neo from The Matrix, including stopping projectiles with a wave of his hand. He learned how to counter Ten's firebreath with a frying pan. At times he's able to escape from his restrains and to top it up, he learned to exploit other characters weaknesses such as Rei's desire for food and Mendo's fear of darkness.Ataru's full name literally translates as, "to be struck by a falling star." The name is capitalized on in the second eyecatch to the series, which shows Ataru getting hit by the star (星, hoshi) character of "Urusei Yatsura", driving him neck-deep into the ground. Helen McCarthy describes his "curse and blessing" in gaining Lum's love as being akin to being struck by a falling star.
EnglishDavid Jarvis (dub for BBC Three)
Steve Rassin (movies 1, 3, 4, 5, and 6 dubs)
Vinnie Penna (movie 2 dub)
Michael Sinterniklaas (TV Series Episode 1-2)
Latin AmericanRaúl Aldana
Castilian SpanishRais David Báscones
ItalianRiccardo Rossi (first Italian)
Massimo Còrizza (second Italian)
Alessandro Tiberi (third Italian)
Gilles Poitras has compared Ataru to Ryo Saeba stating that "Ryo Saeba can best be described as what would happen if Ataru grew up to be handsome, physically fit, a crack shot with any given firearm and a hotshot gun for hire in Tokyo." Ataru was ranked third in Mania Entertainment's 10 Most Iconic Anime Heroes written by Thomas Zoth who commented that "Against all odds, he finds himself the target of affection of beautiful, powerful women, making him the first protagonist with a harem."