BUR #21103 has been approved by @nonamethanks.
rename e9_(valkyrie_drive_mermaid) -> e9_(valkyrie_drive_-mermaid-)
If we look at other Valkyrie Drive characters, they all have the dashes in the qualifiers (see *_(valkyrie_drive*) as well as the copyrights (valkyrie drive -mermaid-), so this one should too.