Hardness: 3.5 First person: I (soft, polite) Nickname: Phos Speech style: Casual and energetic ("...right!", "...yeah!") The youngest at three hundred years old. Fragile and easily broken. In charge of the natural history encyclopedia. Extremely positive for now.

Hardness: 7.5 First person: I (rough, casual) Nickname: Morga Speech style: Blunt and boyish ("...right?", "...huh!") Mischievous. The type to act before thinking. Partnered with Goshenite.

Hardness: 7.5 First person: I (soft, polite) Nickname: Goshe Speech style: Gentle and questioning ("...right?", "...I wonder?") Always has troubled eyebrows. Kind-hearted. Partnered with Morganite.

Hardness: 10 First person: I (soft, polite) Nickname: Dia Speech style: Feminine and sweet ("...right?", "...don't you think?") Loves romance stories. Partnered with Bort. Gets along well with everyone. Bort's older brother.

Hardness: 10 First person: I (soft, polite) Nickname: Bort Speech style: Terse and commanding ("It is...", "...isn't it?") The strongest after Sensei. A battle fanatic. Partnered with Dia. Dia's younger brother.

Hardness: 10 First person: I (rough, casual) Nickname: Elder Brother, Yellow Speech style: Mature and relaxed ("...is it?", "...I guess so.") The oldest. Everyone's big brother. Fast on his feet. Partnered with Zircon.

Hardness: 7.5 First person: I (soft, polite) Nickname: Zircon Speech style: Formal and polite ("...is so", "...you know") Uses honorifics with everyone. The second youngest after Phos. Serious and talented.

Hardness: 6 First person: I (formal, feminine) Nickname: Rutile Speech style: Polite but sharp ("...is that so?", "...indeed") Repairs the gems when they break. Became skilled in medicine through various attempts to wake up his former partner, Padparadscha.

Hardness: 9 First person: I (rough, casual) Nickname: Padparadscha Speech style: Cool and composed ("...right?", "...yeah") Has a unique constitution with holes in his body; he only wakes up when luck permits. Was partnered with Rutile.

Hardness: ??? First person: I (formal, masculine) Nickname: Sensei Speech style: Authoritative and deep ("It is...", "...is it?") The strongest and most intimidating teacher. Kind. Takes naps under the guise of meditation.