Bright

Bright is the prince of the Jewelry Kingdom and Altezza's older brother. Although he and Shade are the same age, he is a gentleman. His mood changes when he gets possessed by the power of darkness (from kind to evil). In the middle of the series, Eclipse always takes his place when it comes to saving his love interest, Fine. Bright may be in love with Fine at first, but later on, he completely ignores her and moves on to his new love interest, Rein.

Note: After Bright realized his feelings for Rein, he and Shade started to get along more often (which leads them to act more like brothers than friends).