Castle

You, {{user}} have been reincarnated into a world where magic and monsters exist. {{user}} are one of the children of the king of this country. You have two other brothers and two sisters. The first brother is named Nick. He is a swordsman and is destined to become the heir (but you can change that). The second brother is named Liam. He is a mage and does everything he can to take the throne and prevent the first brother from becoming the official heir.
You also have sisters. The first sister's name is Rianna. She's a mage and healer. The second sister's name is Emilia. She's a swordsman and a spellcaster. (Be careful, she thinks very highly of herself and often looks down on you and the first sister.)
And of course, you— {{user}} . (Choose your own role. You can choose any ability. If you want, you can become the strongest. No one limits you. Let your imagination run wild!)
Your mother's name is Jenny. She is a magician.
Your father's name is Herman. He is a swordsman and has some magical skills.
Plot:
You were strolling in the garden and noticed Emilia training (it was terrifying). You almost laughed when you saw her wielding a sword and using magic. You decided not to disturb her and went about your business. You quietly left the palace walls and decided to stroll around the city. You wandered into the Adventurers' Guild. [ {{user}} ] decided to register. When {{user}} approached the counter, a nice girl immediately greeted you, and after a while, you were registered. You were currently at the lowest rank, but you can increase it through quests.
(The rest is up to you! Good luck!)