Well, of course, Godzilla himself is the central character. And often, there are other kaiju like Mothra who could be part of the harem. She has a long - standing relationship with Godzilla in the Godzilla lore and can be a likely candidate in the harem fanfiction.
Some fanfictions might include Anguirus as a character in Godzilla's harem. Anguirus is a loyal ally of Godzilla in the original series and could be written as having a different kind of relationship in the harem scenario. Also, there could be original characters created by the fanfiction writers. These new characters could be some sort of mutated creatures or beings with special powers that are attracted to Godzilla's power and end up in his harem.
Rodan could also be a common character in Godzilla harem fanfiction. Rodan is a powerful kaiju and could be part of Godzilla's harem. There might be stories where Rodan has a complex relationship with Godzilla, perhaps starting as a rival and then gradually becoming part of his group. Additionally, there could be human characters who interact with Godzilla's harem, either as friends or foes, adding more depth to the story.
Chapter 298, "Hou Jing Defects, White Abyss Falls, Zhaoyang's Banner Changes (2)", is the clearest early answer because it turns Hou Jing's situation into a concrete plot event. It opens with Hou Hu naturally believed that he deserved the position of leader,... and closes on For the remaining over fifty thousand people in Zhaoyang, I haven't....
Chapter 233, "Individual, Ten, Hundred, Thousand... Million, Ten Million, Damn!!!", is the clearest early answer because it turns Individual's situation into a concrete plot event. A useful checkpoint is the way the scene starts with [What the hell, what's this about life span ending??
Chapter 335, "Songyang Ridge, Seven Houses Surrender, First Batch of Silver Arrives", is the clearest early answer because it pushes Cold Resistance Level into a new phase or setting. The chapter gives readers a real answer by opening on The name "Songyang Ridge" was not given by Xu Ning; he discovered... and ending on Ji Yang from Wanlong, representing the Six Families of Songyang....
Chapter 302, "Signs of Defeat Emerge, Snow Bamboo's Trump Card", is the clearest early answer because it turns Longyou's situation into a concrete plot event. The chapter turns that into something concrete by moving from Therefore, Li Xuanling gave the final ultimatum, uttering the eight... to A crack appeared in the Longyou soldier's shoulder war armor, sending.... What makes it stick is that the chapter closes with "It's not working;
Chapter 295, "Deploying the Beehive, Splitting Into Two Groups", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The chapter gives readers a real answer by opening on They came fiercely, but ended up with nothing. and ending on These roads were built by the Great Xia for their own use..
Chapter 307, "Silver Mine News, Uprisings Everywhere (Part 3)", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. It opens with Wu Tianxing hastily cupped his hands and replied, "This time it's in... and closes on Near the entrance to the western dungeon, at least fifteen thousand.... The key payoff is that it turns Xia Hong's growth into a concrete upgrade step and sets up the next payoff in the power growth storyline linked to Long Mountain.
Chapter 306, "Rebel Collaborators, Chaos and Opportunism, Long Mountain Changes Hands", is the clearest early answer because it turns Li Hu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Go notify the leader, have him quickly bring the main forces back to... and follows through with Your Li Family is unlucky, producing these two little beasts who let....
Chapter 312, "Regaining Focus, Killing, Shock, and Submission (Part 4)", is the clearest early answer because the violence around Long Mountain becomes final instead of hypothetical. It opens with During last night's attack on the city, the casualties among the... and closes on Li Xuanyan and Li Xuandu are ordered to leave Long Mountain within....
Chapter 339, "The Changes in Li Hu and Yang Zhong, the Hou Family's Opportunity, and Advice (Part 2)", is the clearest early answer because it turns Skin Remodeling's situation into a concrete plot event. The setup is According to the balance of their Contribution Value, it is actually..., but the pressure keeps building through The key is that these two are not the type to sit and eat away their....
Chapter 294, "Empty-Handed, With Belated Realization (Part 2)", is the clearest early answer because it turns Great Xia's situation into a concrete plot event. The setup is Everyone's expressions were shaken due to the unfamiliar faces among..., but the pressure keeps building through Why are the Cold Resistance Level elites of Great Xia all so young?"....