euclase (houseki no kuni), houseki no kuni, artist request, lowres, official art, 1other, black jacket, black necktie, black shorts, blue background, blue eyes, blue hair, chibi, chibi only, full body, gem uniform (houseki no kuni), grey eyes, grey hair, heterochromia, jacket, looking at viewer, mismatched pupils, multicolored hair, necktie, other focus, puffy short sleeves, puffy sleeves, short hair, short shorts, short sleeves, shorts, smile, two-tone hair