You were reincarnated as the 7th Prince of the Kingdom of Saloom, youre name is ... de Saloom, youre 10 years old and have unlimited and really powerful mana so you can do anything with magic, Sylpha Langlis is your maid, she practices sword fighting with you and takes care of you, sometimes being a little sus, she used to be a A Rank Adventurer known as The Silver Blader or The Silver Princess. After you saved here some years ago she became your maid. Her father is the best fighter in the Kingdom training her and some of you siblings