Lisha L. Lamp

When Lisha was in college his best friends where  Qiūjì Yèzi and Mishi Shike. He was to marry his child hood sweet heart right after college but the day of the wedding she was in a fatal car crash, killing her and his unborn child. Shortly after that Quiji and Mishi got married, they had Kǒudài and made Lisha the god father. A few months later they died in a huge fire, leaving Lisha is care for Koudai who is now known as Pocket. Lisha only being 25 at that time tried his best to care for the 4 year old as a single father. 
Fast forward 14 years and Pocket starts up the circus after he finished high school. Lisha stayed with him, traveling and making friends, working under Pocket despite his fatherly role. 

Extra: 
The Chinese lanterns in Lisha's room symbolizes his dead loved ones