How many niconico utaite had their own songs? Oh, and together with the song names please. I only know Kimi no Me Wo by Soraru.
well i doubt anyone can list all utaite who had their original songs, but i can list some i know (totally incomplete though):
uh and i bet still quite a lot. since some collaborate with producers (like Soraru), some also do their own original song (like ＿＿), some do originals in their doujin circle (like Yuikonnu) and some do originals in their group (like RootFive (√5)).
And also i guess when a new album is released it's very likely to feature an original song.
actually the original songs are marked on the wiki either with a "(Original)"-tag or in an separate list
Naturally, the number is uncountable, since there are many small unknown utaite who also have their own songs, but...
I would say from my experience that about 40% of utaite on this wiki have some sort of original song, whether it's composed by themselves or by someone else. When it's composed by someone else and the utaite is simply the original singer, it's called NNI, short for Nico Nico Indies, so if you want to explore original songs, it would be a good idea to look in the NNI tag on NND.
Among the utaite on here it would be difficult to compile a list of original songs, but from looking over the most popular utaite and using ctrl+f to find the word "original" (since we do label original songs as such), here's a short list:
Don't forget that this list is super incomplete.
Also, I'm guessing you're the one who asked about Gero's RAINBOW GIRL original PV. I would suggest getting an account if you want to be more involved or just to learn more about utaite ^-^
What do you think?