At first, he worked for birds in the Obsidian Prison Break Team, but later he was tamed by larks and learned the school song of Hesheng Middle School.

In the future, I contributed to a gang finding the enemy's trail. Later, ten years later, in the war with, the lark suddenly changed into the lark ten years ago, and Xiaoyun Dou appeared in front of everyone, still singing the school song.

I often stand on the shoulders of larks and often sing the school songs of middle schools.

It is often written about the same culture, and many places sell its surroundings.

It symbolizes the free and unconstrained cloud-like characteristics of larks. In cartoon 320, Duyun and lark's gear were changed together, and Dou Yun became a flat head.