Why is Hua Ling called Da Gua?

I like frogs. A search on Sohu showed that Hua Ling really likes frogs, so her fans named her Da Gua. Hua Ling is a Chinese-Japanese bilingual voice actor and singer. She is good at girl characters and children's characters. Her representative works include: "Honkai 3", "Honkai Academy 2" Theresa, "Genshin Impact" Keli, "League of Legends" Zuo Yi, "Battle of Double Pamish" Karenina, etc.