Ruppina (Mai Kudo) sings pretty well. Here’s a part of her concert at Velfarre 2004.09.18, taken from the DVD that comes with her Best of album.
Ruppina ~ If~Free Will~Faith Live
198MB 15:08 XviD 624×468
(sample) 10 MB 00:44
Ruppina ~ If~Free Will~Faith Live for PSP
58MB 15:08 H.264/AVC 368×208
This video is kind of big, so you can check out the sample video before downloading the torrent if you like.