The protagonist of the novel is Ya Meng Ji Meng Wen

Guardian Sweetheart was a very popular anime that told the story of the protagonist Yameng Jimeng and her guardians helping people solve various problems through hard work and courage. This anime had been completed and there were many related novel versions. Some of the novel versions include: 1. Protect Sweetheart! Heartbeat! This was the final novel of Guardian Sweetheart's first novel. It told the story of Yameng Jimeng and her guardians in school and their daily lives. 2. Protect Sweetheart! [Yameng's Diary: This is the first spin-off novel of Guardian Sweetheart. It tells the story of Yameng's family members and her friends.] 3. Protect Sweetheart! Only the World! This was the final novel of Guardian Sweetheart's second novel. It told the story of the protagonist, Yui Sei, and his friends in school and their daily lives. 4. Protect Sweetheart! Hashimoto Arianna's Yameng Diary ": This is the second derivative novel of Guardian Sweetheart, which tells the story of Hashimoto Arianna's family members and her friends. These novel versions all contained various elements of Guarding Sweetheart, including story plots, character development, emotional descriptions, and so on. The readers could choose to read according to their preferences.