BUR #3865 has been approved by @evazion.
rename ciel -> ciel_(tsukihime)
rename hisui -> hisui_(tsukihime)
rename kohaku -> kohaku_(tsukihime)
rename len -> len_(tsukihime)
rename white_len -> white_len_(tsukihime)
All the characters in this BUR are a common name (especially Ciel) and so I thought they need a qualifier to their name.
(Not really sure about the last one, though)
EDIT: The bulk update request #3865 (forum #175505) has been approved by @evazion.
Updated by DanbooruBot