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One of two male DearS in either anime or manga.
Khi is a very docile individual, even more so than a usual DearS. Called the "black sheep" he is essentially an errand boy for whoever happens to order him around. As such it is Khi who is tasked with convincing Takeya to "relinquish" Ren back to the community, however unwilling he is to do so. Khi is the first to think of Ren and Takeya's relationship as the DearS's mythical "gift" and is often explaining it to other characters in the series. He is also the one that has to explain to Miu the "symptoms" of love, when Miu mistakenly assumed that what she felt for Takeya was also the "gift".
He is usually covered in bruises and bandages, which can be explained in two ways, one, which is the sole reason givin in the anime, is that Rubi was "punishing" him. The scene that the line takes place in however... let's just say that it is slightly disturbing. The explanation in the manga is that Khi's homestay has a certain boy who calls Khi his friend. Ironic because the boy beats the tar out of Khi and still thinks of him as a friend.
Oddly, Khi goes to school with Takeya's little sister, and the little girl had no idea until she was told point blank.