Arika carries the Blue Sky Sapphire (蒼天の青玉 Sōten no Seigyoku), a GEM necklace inherited from her mother and a symbol as Otome to the Windblooms. This GEM has been activated a few times when Arika was in danger and by materializing a robe when she didn't have any nanomachines in order to keep her airborne and to blast a SLAVE away. When it was used against the SLAVE, it released two gems, one for Arika and one for Mashiro, which went into her ring. The two made a contract and
The Blue Sky's true form
defeated the SLAVE. Unable to remove the gems the two decide to keep this a secret from the Garderobe staff, but when Schwarz and Artai launch an attack on Windbloom, the Gem is brought back and Arika utilizes the robe though according to Miyu she has not tapped into its full potential and still requires training.
As it turns out, the Sapphire's true power is the robe, Ultimate Blue Sky, that her mother, Lena, wore when she was an Otome. This robe was instead blue with a green cape on the back. Miyu revealed that the power could only be unlocked once Arika accomplished one final goal, to kill/free her mother from Schwarz's capsule.
While in a Meister Robe, Arika wields a double bladed crystal lance as her Element; her primary attack is called "Bolt From the Blue." Her enhanced mode special Element is the Sword of Akatsuki (a reference to Gear Fighter Dendoh, which had a similar weapon). In addition, her hair turned gold like with her ancestor, Alyssa. Screenshots of the Mai-Otome Playstation 2 game "Otome Butou Shi" showed Lena using a Bolt from the Blue even larger than herself and suggested that Arika still has not achieved the full power of the Blue Sky Sapphire. [1] However, by the time of the OVA, Arika has mastered this power as well.