The female protagonist of To Love-Ru, Lala is the princess of Deviluke, whose family rules the Galaxy. As such, her hand in marriage is sought from across the Galaxy as she is (presumably) the successor to the Galaxy's throne. A rather childish girl, she is somewhat naïve regarding the culture and customs on Earth. Lala initially runs away from home, as she does not wish to get married to any of her suitors, and due to an accident, ends up naked in Rito's bathtub. Upon arriving on Earth, Lala pretends to love Rito to keep herself from getting married, but really does fall in love with him after she misinterprets a statement that Rito shouts in self-defense. Although Lala appears to be somewhat airheaded, she is well known on Deviluke for her genius-level intellect and enjoys making all manners of inventions, often prompting some disastrous effect or another. Throughout the series, she frequently tries to get Rito to love her, although her grand gestures generally end up putting Rito and company in embarrassing situations. Although Rito frequently chastises her for causing embarrassing and otherwise troublesome incidents, Lala rarely shows any form of negativity towards him and even states it is impossible for her to hate him. Even after finding out that he was in love with Haruna as well, she instead cheered and stated that they could both marry him, and becoming even happier after he accidentally said "I love you" to the rest of the female cast, as they could all be together.
Eccentric, playful and intelligent, Lala isn't shy, to a point where it feels almost natural for her to be in the nude (the only exception of this occurs when Lala catches a personality changing fever from another planet, making her very shy). Like all citizens from Deviluke, Lala's physical abilities vastly exceeds that of a human (in one instance, she manages to blow away a typhoon just by shouting) and has a distinctive tail with a shape of a spade on the end that can shoot a destructive beam. Oddly, her tail is very sensitive, causing her friends to nickname it her "weakness" (all female Devilukeans' tails are more sensitive than a male's) despite being able to throw Run and Saki to a wall while they mess with it. Unfortunately, Lala is bad at cooking. The food she cooks is either inedible or extremely spicy. While the fact that Lala is an alien is initially a secret, it becomes common knowledge relatively soon after her arrival with no one making a big deal about it. According to Ringo, Lala's measurements are B89, W57, H87.

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