I want to know if Nagareru or ustukushi can be name. Cuz i read article talk about japanese name cannot be certain things like this. Just want to know, can nagareru be name. I names my character this based off the meaning, to flow. Edit: Sorry, major error. I spell cat, I meant character.
流れる(nagareru) is a verb and 美しい(utsukushii) an adjective. Both of these words are not used for names, but their kanji characters are. for example 流 can be read as haru and have the meaning of flow/stream. same goes for the character 美 which is often used for a girls name.
but in the end it is all up to you how you want to name your character, and if you like nagareru then you should stick with that name. to make it a noun instead of verd make it nagare which means flow.