@grunty: Only Kajiura credited in 'into the water" as chorus so I bet its Kalafina + her on the song.
credits
I still miss Cello. you are free to correct.
M1 into the water
Chorus: Yuki Kajiura
M2 Monochrome
Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi "Jr" Tomoharu
Percussion: Nakajima obawo
Accordion: Sato Yoshiaki
M3: Gogatsu no mahou
E.Guitar: Kyoichi Korenaga
Accoustic Guitar: Takashiro Koichiro
Drums: Koichi Sato
Bass: Takahashi "Jr" Tomoharu
Strings: Kiyo Kido Strings
Chorus: Yuriko Kaida
M4: ring your bell
E.Guitar: Koichi Korenaga ,
Drums: Kyoichi Sato ,
Bass: Tomoharu “Jr.” Takahashi ,
Strings: Kiyo Kido Strings
Chorus: Yuriko Kaida, Yuki Kajiura
M5 Usumurasaki
Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi "Jr" Tomoharu
percussion: nakajima obawo
Strings: Kiyo Kido Strings
M6 indentify
E.Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi "Jr" Tomoharu
M7 Hokage
Violin: Hitoshi Konno, Todo Masahiko
Viola: Ooharu Mie
Cello: Seigen Tokuzawa (徳澤青弦)
Piano: Masato Matsuda
M8 One Light
E. Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi “jr” Tomoharu
Strings: Hitoshi Konno Strings
Chorus: Yuriko Kaida
M9 Musunde Hiraku
E.Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi "Jr" Tomoharu
Strings: Kiyo Kido Strings
Chorus: Yuriko Kaida
M10 heavenly blue
E.Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi “jr” Tomoharu
Strings: Kiyo Kido Strings
Chorus: REMI
M11 sorairo no isu
Accoustic Guitar: Furukawa Masayoshi
Violin: Hitoshi Konno
Viola: Ooharu Mie
Cello: Seigen Tokuzawa (徳澤青弦)
M12 believe
E.Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi “jr” Tomoharu
Strings: Kiyo Kido Strings
Chorus: Yuriko Kaida
M13 far on the water
E.Guitar: Koichi Korenaga
Drums: Kyoichi Sato
Bass: Takahashi "Jr" Tomoharu
Strings: Kiyo Kido Strings
Flute: Akagi Rie
Chorus: Yuriko Kaida