Sol Titanion

Sol Titanion, known as Sol Titanian (ソル・ティターニャン) in Japan, is one of the Einherjar Eight Warriors in Mega Man Zero 4. Titanion is based on the fairy queen, Titania. She occupies an artificial sun that was was originally designed for weather control but modified it to overheat and spread the heat waves for desertification. The fight takes place in a room with no walls; in addition, it is filled with strong sunlight in which if Zero stays in for too long, he takes severe damage.

Mega Man Zero: The official complete works
She used to operate the artificial sun with another Reploid of the same model. Her counterpart was destroyed by a squad dispached by Weil, and Titanion's operation circuit was rendered useless. The squad responsible was turned to ash by Titanion soon thereafter, and since then she destroys for the pure pleasure of it.

The wings, which symbolize her, seem to be emitted from flamethrowers built into her back. These are drawn in great detail here.

Data
Nickname: 熱愛の蝶姫 (Netsuai no Chouki, The Butterfly Princess of Passionate Love)

EX Skill: Burning Meteor/Neo (バーニングミーティア／ネオ)

Mission: Halt the Sun

Zero's EX Skill: Burning Shot

Attacks

 * Launches two green razor fans travelling in a pattern.
 * Launches two pink razor fans travelling in a pattern (harder to dodge than the green ones).
 * Lays three landmines that cause contact damage and also explode after a few seconds, launching a spray of projectiles into the air. These mines can be destroyed.
 * Fires off a flamethrower from her chest that repeatedly extends and retracts, while flying twice across the screen.
 * EX Skill: Raises her hand and creates a large/small (Depends on the weather and mode) sphere and launches it right at Zero, breaking into six/four (Depends on the weather and mode) shots.

Stage enemies

 * Sub-boss: Tyrine and eight GlassCannons
 * ArcCannon
 * Axeloid
 * Poplan
 * RBCannon
 * Variant Fire
 * SandDozer