Lena Sayers' Blue Sky Sapphire
A GEM (Generable Enigmatic Matrix) controls an Otome's access to her powers. The name "GEM" is actually a pun, as GEMs are named after actual gemstones and resemble them. They always come in pairs, one is worn on an Otome's left ear and the other is on a ring of the Otome's Master excluding the Columns, Pearls and Corals. This is purely ceremonial however as physical contact is all that is required evidenced by Mikoto who holds her GEM in her belly.
Except for the Five Columns, the GEM requires authorization from the Otome's master before it allows her to materialize her Robe. It is never clear how Meister GEMs are made in the anime; in the manga, in the opening of chapter 2, it is explicitly mentioned that Meister GEMs cannot be made. In either case, GEMs are preserved when an Otome cancels their contract, as is evidenced by the Pure White Diamond, the Sky Blue Sapphire and the Abyssal Green Jadeite. However, the Excel Elegance White Onyx is never shown after Fiar is killed by Midori. Some GEMs are also lost, such as the Neptune Emerald shown in the last episode of Mai-Otome Zwei.
GEMs[]
| Image | Name | Holder(s) in Possession |
|---|---|---|
| Coral | Garderobe first year students | |
| Pearl | Garderobe second year students | |
| Break String Spinel | Juliet Nao Zhang | |
| Ultimate Black Diamond | Nina Wáng (from Episode 17) | |
| Continental Orb Topaz | Haruka Armitage | |
| Blue Sky Sapphire | Lena Sayers (former) | |
| Fire Stirring Ruby | Mai Tokiha | |
| Bound Dragons Rhodonite | Raquel Mayol | |
| Lofty Crimson Jade | Ayane Hazakura (former - manga) | |
| Neptune Emerald | Nina Wáng | |
| Pure White Diamond | Fumi Himeno | |
| Galactica Marine | Elliot Chandler (former) | |
| Ice Silver Crystal | Iruma Vandeveld (former) | |
| Bewitching Smile Amethyst | Una Shamrock (former) | |
| Pure Heart Malachite | Akane Soir | |
| Spiral Spin Serpentine | Shiho Huit | |
| Abyssal Green Jadeite | Rosalie Claudel | |
| Excel Elegance White Onyx | Fiar Grosse | |
| Arise - Special Task Otome Force | Chie Hallard | |
| Flowing Water Diopside | Monica Julen | |
| Eternal Recurrence Jasper | Maria Graceburt | |
| Illusionary Lapis Lazuli | Yukariko Steinberg | |
| Swirling Dance Fluorite | Mahya Blythe | |
| Stormy Sakura Chrysoberyl | Sakura Hazakura | |
| Whirlwind Rose Quartz | Kyoko Tsumabuki | |
| Infinite Wisdom Azurite | Anh Lu | |
| Intensely Playing Peridot | Rei Juckernaut | |
| Rushing Dragon Lazulite | Rila Mariposa | |
| Flowery Splendour Enstatite | Laula Bianchi | |
| Rumbling Thundering Garnet | Carla Bellini | |
| L.R. Zoisaite | Sylvie Mosse |
Manga-only GEM
| Image | Name | Holder(s) in Possession |
|---|---|---|
| Black Smoke Chrysoberyl | Nina Wáng (manga) | |
| Rainbow Cloud Rhodonite | Erstin Ho (manga) | |
| Mysterious Peridot | Akira Okuzaki (manga) |