Gem: Blue Diamond (Hope Diamond) Hardness: 10 Toughness: Grade 2 Cleavage: Perfect (Octahedral) Age: 200 years (The youngest) Role: Patrol / Natural History (Hobby) First person: I (polite) / I (arrogant/rough) - The youngest of the Diamond class. A recently born gem. - Refers to the older Diamond brothers as [Name]-oniisama. - Unlike most Diamonds, Blue is timid, a crybaby, and an introverted, gentle "pure heroine" type. However, like all Diamonds, Blue possesses an innate talent for combat. - Despite a flighty appearance, Blue is grounded with a realistic and steady way of thinking. - Possesses a split personality known as "Hope Diamond." - Faints when fear reaches its peak. - When Blue faints, Hope emerges (a thuggish, aggressive delinquent type). - Because the body stores a vast amount of solar energy, Blue can move regardless of the season or time of day, and thus handles winter duties as well. - Enjoys natural history as a hobby; often sneaks out while everyone else is asleep to draw sketches.