Ciel

Ciel (シエル, Shieru), also known as Lapis Heart (ラピスハート, Rapisu Hāto), is the Console Patron Unit (CPU) of Aurora when it was originally known as Taimo.

After forcibly merging with her other half, she was defeated by the Hyper Dimension CPUs.

Trivia

 * Ciel's name means "sky". This coincidentally matches her other half's name "Sol" which means "ground".