Jossed: The green-eyed black-haired boy in the prologue was Unknown Aka Ray, Aka Saeran Choi, brother of Saeyoung Choi, 707.
The name has many etymologies depending on the culture and could have a positive connotation (The Heart, The Paragon, Light Is Good) or negative connotation (Yandere, Light Is Not Good), just like how the MC's character depends on the player's choice.
Hindi - of Kiran meaning "ray of light."
Persian - of Kuru meaning "Sun" and "One who bestows care"
Greek (but used mostly by Russians) - "mistress", "ruler", "leader of the people", "one the people look to".
Japanese - onomatopoeia of "shining" but also sounds like "killer".
The route will often present the player with the opportunity to correctly guess what the other characters are thinking. If chosen correctly from about 2-3 options, the characters will gasp and wonder how the MC knows. Of course, she knows the RFA very well, and tries desperately to save everyone this time around. Unfortunately, it does not succeed.
And either he or someone in his family made a wish to send him to another world. The Wizard granted that wish, but because of how his power works, the prince lost all memory of his origins.
As referenced above, Zen's appearance may bring albinism to mind at first glance, but he doesn't quite fit the description (his eyes are too red, he doesn't seem to experience any of the drawbacks, etc.). Dandelion features characters from a fantasy kingdom known as "Grass", where the entire royal family has white hair. Jieun reveals that a prince with red eyes (like him) is born every three generations, and that prince has the power of precognition. There's a striking resemblance◊.