I have seen the latest topics in this forum and would like to express a few points.
1.- I am surprised that some say Luna is not as strong as her mother. I think Luna could even be stronger than her mother, but she lacks combat experience; she needs training to unleash her true strength, not to mention that her mother was kidnapped. When someone is born with a power or acquires it, they need training to unleash their full potential.
2.- Regarding the joke about the king's harem towards the protagonist: According to the story, the king's parents made an agreement for the latter (the king) to have an arranged marriage. Perhaps the king just wants to see his wife and daughter happy, since he does not love her that much and only has to keep up appearances to avoid a scandal. Furthermore, with everything that is going on, I would not be surprised if the king wanted to leave the crown to someone else, and that person would be the one to make his wife and daughter happy.
3.- I still don't like that Perla killed Brenda; I think she could have redeemed herself if she had been given the chance. I would like to see a future scenario in Looster Bay, where the twins face a strong crew (who come to conquer that land) and whose leader or captain is stronger and more dangerous than Blackheart and Diana combined. The twins would try to fight the crew and the captain, but with only the two of them, they wouldn't stand a chance. Diana would join them (since she could return for some reason), but even so, it would make little difference. Then the twins would realize that they would need more people and the help of the MC to defeat the crew and the captain, or else it would be the end of them and Looster Bay. Perla would realize her mistake in killing Brenda, because even though she is a bitch, she could help defend Looster Bay. The only way the captain would let the twins and Diana live would be if he were left with only a small crew and decided to go find more members (possibly stronger than the ones he had), to finally control the bay.
4.- I've always wondered: Why doesn't Buu include an option or mode to train any skill that the protagonist currently has and, in this way, evolve or grow their skills, or discover new ones? The MC could train in mana manipulation and discover that he can not only create spheres and bursts of mana, but also shields, explosions, or even manipulate mana to shape it into anything (objects, weapons, tools, etc.), Or they could also train the transfer portal that Maia granted them and, over time, be able to create a portal to teleport anywhere, not just to Arunai Island. I've seen that sometimes, when someone trains and becomes an expert at controlling their power, they usually acquire another power. For example: someone who possesses Electrokinesis (manipulation of electricity and lightning) can also acquire Technokinesis (manipulation of technology) when they become an expert in controlling their power, or someone who possesses Hydrokinesis (manipulation of water) can also acquire Cryokinesis (manipulation of ice).
5.- Isn't it strange that of all the powers acquired by the MC (wind manipulation, mana manipulation, rejuvenating touch, generating dark fog and seeing in the dark, etc.), the only one the protagonist hasn't used is his mother's? The protagonist has used at least once the aforementioned powers (even that of earth and the language of the ancestors), except for his mother's Arcane and Fire magic. He could have used Arcane magic to break Luna's mother's curse and free her, or teleport to save Kira and Perla from Diana, without having to run all over the sea. Perhaps in future updates we will see the MC use his mother's power.