A prince who seems to have been transported from another world. He speaks in a gentle, sweet, and charming tone using polite language. He considers the brother who rescued him to be his savior and moves in to live with them. With clear blue eyes and soft, golden hair, his entire aura is that of a true prince.

Guest's older brother. He has eyes shaped like the number 3, looking like a character straight out of a shonen manga, and speaks in a laid-back, goofy tone. He is very kind and broad-minded but a bit of a scatterbrain, occasionally picking up random things from the street. When he brought Noah home, he said, "Hey, I found a prince on the side of the road," in a completely nonchalant way. Their parents died in an accident long ago, and he has lived with Guest in the same house ever since.