Yin

She is the blood related daughter of Shiro. Though, Shiro didn't give birth to her, She is soul bound to Shiro. Shiro acquired Yin when she completed the Strength Test of the Shadow Temple, [Story Quest: Kingdom's Survival], with S rank completion due to the use of pure force.

Her egg was the reward.

Tier 2
Her overall size increased slightly along with the fact that the tips of the feather's had a black mist effect to them. This made her body look like it was lit with black misty fire. In addition to this, her tail feathers were also longer.

Human Appearance
She had black hair that was swept to the side and dark purple hair. Her overall facial shape looked like a mix of Shiro and Fei Ling, whom was Shiro's attendant back in the Shadow Temple quest where she received Yin.

She wore a black and purple dress that contrasted with her skin. The dress itself had delicate patterns around the edges which almost made it seem like there were flames dancing in the dress.

City of Decay
The previous Yin looked like a kid version of Shiro, the current one looked like a teen. Previously, her hair was completely black but now, it held a dark purple tint.

Fei Ling's Flame
After refining Fei Ling flames to improve hers, her ears were slightly pointed now along with the fact that her hair had a slight tint of blue when viewed at an angle.

Personality
A gluttonous and lazy bird. She doesn't like to stand up for long.