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Lala is the princess of planet Deviluke and is also one of the main characters in To Love-Ru.
In the anime, we are introduced to Lala right off, although she is not named until a short time later. This "later" is when Rito is taking a bath to wash away the humiliation of yet another failed confession. Lala uses one of her "inventions" to escape the drifting ship she escaped Deviluke in. As with all of her other gadgets this warp device has a catch...it only can teleport flesh. So, in typical a typical ecchi fashion, Lala materializes in Rito's bathtub. Completely nude, with Rito groping both of her large breasts. The kicker of this amusing situation is that, on Deviluke, grabbing a girls breasts is considered a marriage proposal. This, coupled with Rito's subsequent acts of protecting her from her own bodyguards, utterly convinces Lala that Rito loves her.
Characterwise, Lala is a typical ecchi series female lead. Well endowed, not body shy at all (unless under influence of a space cold), and utterly clueless with regards to decent conduct. An intersting quirk about Lala is her tail, if grabbed, like in one instance with defrosted space mollusks, two things happen: Lala gets very faint and weak, and her breasts get larger.
As a person, Lala is happy, bubbly, and very friendly (again, unless under the influence of a space cold). She is very forgiving. Example, an assassin is sent to kill her but when the assassin in... having difficulties, Lala is the first to help the assassin out. While she almost always comes across as an air-head she is actually quite bright, always inventing things. Although these inventions always have at least one flaw. Another example of this besides the warp device is the outfit she wears. While it can camoflage itself as absolutely anything it has a finite amount of power, when this power runs out the outfit shuts down, leaving Lala naked (only in an anime could you find somthing like that.)