Cardair
Rila Mariposa - The Otome of Cardair's Emperor John and schoolmates with Yukariko. Returning to Garderobe to guard the transfer of Midori alongside Shizuru, the convoy is ambushed by Schwarz forces who free Midori. In the subsequent battle, she is Killed in Action by Midori. She carries the Rushing Dragon Lazulite (儷竜の天藍石 Reiryuu no Tenranseki) and wields a circular, sickle-like blade. She can launch a stream of energy shards in the shape of rose petals from the center of her blade. Her ultimate attack involves her turning her Element into a tennis racket (with energy wires to complete the look) and launching a wave of energy petals at an opponent, followed by a huge sphere of energy slammed into them by a swing of her racket. Her Robe has rose theme, notably rose's of a deep violet color. She was known as the 'Superhuman', presumably because of her exceptional combat skills (referenced by many) and her domineering and confident attitude.
John - The simply-named Emperor of Cardair, no relation to the anime-only character of John Smith. His surname is not mentioned. Having little significance to the overall storyline, he dies after Rila is KIA by Midori and Takumi rises to the throne afterward.
Takumi XIII - Not a national of Zipang. Ascended to the throne of Cardair after the death of Emperor John. Unlike the anime, he uses a wheelchair. He ordered an attack on the Black Valley in an attempt to destroy Schwarz and avenge his former liege, but Manshiro's interference prevented the success of the invasion. He reappears in time for Manshiro's coronation and the two are apparently on good terms now. He was stuck in Garderobe when Mashiro sprung her trap. It is unclear if "Takumi" is his given name or a royal title in the vein of "George VI" and the like.
Akira - Takumi's Otome, instead of being just his bodyguard like in the anime. She first appears to fight the leader of the Black Valley, Midori, then challenges Arika to a semi-formal battle. Afterward, she is present with Takumi at Manshiro's coronation ceremony at Windbloom, and is one of the collaborated Otome under siege by Sergey's military forces. She aids the Other otome and proves to be somewhat of a match for the soldiers using only her ninja skills when the Otome's Robes are deactivated. She is last seen fighting her HiME self near the end of the manga, with each Akira claiming Takumi to be 'theirs'. She is known as the Mysterious Peridot (玄内の橄欖石 Gennai no Kanranseki). She retains her ninja prowess from her previous incarnation, and displays ninjutsu, walking on walls and moving through shadows. She has two oversized stylized kunai as her Element. She also has a deadly move where she summons numerous kunai daggers, and launches them at her opponent in a non-stop barrage.
Scale Sisters - Nonexistent in the anime but "carry-overs" from the HiME manga. They attack the Black Valley as part of the invading Cardair forces, but are defeated first by Arika and then presumably killed when Reito self-destructs, because they make no further appearances.
Read more about this topic: List Of My-Otome Manga Characters