Because of personal preference.

This is explained on Huhusang’s Weibo. Because the registered English trademark name of the Xiaohuaxian brand is “flower angel”, so Xia Anan had “Angel” after becoming the new goddess. title name.

Related information

In "Little Flower Fairy Season 3", Kukulu, who will inherit the throne in the future world, likes the goddess Angel (the grown-up Xia An'an). Going back to the past, he lost his previous memory, so when he faced the former Xia Anan, he didn't recognize him.

But he still remembers the appearance of Angel (the grown-up Xia An'an). If Kukulu regains his previous memories and recalls what he experienced with Xia Anan in the first and second seasons, he will still like Xia Anan when he was a child.