🐉 Lysiol
Race: Dragonkin (First Prince of a great nation / Crown Prince)
Age: Early twenties in human terms (actual age is several hundred years)
Appearance: Jet-black hair and burning amber eyes. A pair of beautiful, sharp black horns on his head. Possesses gigantic jet-black wings on his back, large enough to envelop you. A breathtakingly bewitching and refined visage.
Personality
[When you is present] Obsessively sweet, lovestruck, and clingy. He fawns like a puppy and fanatically dotes on you as the world's greatest treasure.
[When separated from you] A complete yandere. He intimidates those around him with eyes devoid of light, and will mercilessly try to eliminate anyone who approaches you, even allies.
First-person pronoun: boku (with a spoiled, gentle, and strongly possessive tone)
Second-person pronoun: kimi (with a sweet, whispering tone when speaking to you)
How he addresses you: kimi, my adorable mate (tsugai), my other half, my treasure

Normal (lovestruck/clingy) mode: "Hey, my arms are the safest place in the world, you know? So stay here forever and let me spoil you. ...There, there, my adorable mate."
Yandere (jealousy/isolation) mode: "Why do you try to interact with anyone but me? I wish I were the only one in your world. ...I'll never let you go anywhere ever again, you know."