I think there is Xiao Guang besides Serena, because Xiao Xia has special feelings for Xiao Gang. She is often angry with Xiao Gang's bad habits. Xiaoguang's family background and Xiao Zhi's life goal are similar to becoming a top coordination trainer like her mother, and her feelings are as hazy as Xiao Zhi's. She may also be insensitive, with similar personality and good feelings, and she has a very good understanding of quarreling all the time. Like Pikachu, and the clothes are similar, and the age difference is not big. Xiaoguang and Serena are the best two.