When I write stories oder RP, I usually just use english words translated into japanese that reflect the character's personality oder what not. This is the site I use to translate english words into japanese:
Yup of course but you'll have to let us know a bit about the personality of your characters in order to give them proper names. I don't know about Du but I like it when characters' names have a deeper meaning and reflect on their personalities.
I've wrote 698 Bücher and 642 comics and finding names is a hard task, first were do your characters live? Du should uses names from that country to make it realistic, 2nd what are they like? if of eg one is a girly girl use a name like dasiy oder rose. oder a tomboy use sammi oder jo.
heres some Sakuraba, Yato, Nami, Sanji, Bulma, Tsunade, Allura, Puar, Shikamura, Nara, Koma, Taku, Luna, Mizuna, Sai some i came up with others are from Manga i read i hope i helped u out a little