The bulk update request #4186 is pending approval.

create implication aki_tsukane (2) -> utau (670)
create implication aro_rouon (43) -> utau (670)
create implication arugo_tsudzurine (2) -> utau (670)
create implication bai-f0 (2) -> utau (670)
create implication baion_urushi (1) -> utau (670)
create implication cerif (2) -> utau (670)
create implication darky_ryu (13) -> utau (670)
create implication dave_okatsune (3) -> utau (670)
create implication dengen_(gran678) (3) -> utau (670)
create implication dodger_akame_(character) (37) -> utau (670)
create implication draco_ryumaru (1) -> utau (670)
create implication gekkou_himagane (2) -> utau (670)
create implication giga_lacan (4) -> utau (670)
create implication hiiro_akagami (4) -> utau (670)
create implication ikuto_waon (40) -> utau (670)
create implication in_jekuto (4) -> utau (670)
create implication kasane_teto (12) -> utau (670)
create implication kateru_houon (8) -> utau (670)

Reason: All of these characters are associated with UTAU voicebanks and can be found on https://vocadb.net, https://utau.fandom.com, or a similar site.

According to the linked wiki:

UTAU is a Japanese singing synthesizer application created by Ameya/Ayame.

UTAU is similar to the VOCALOID software, with the difference being it is shareware instead of under a third party licensing, and anybody can create an UTAUloid! UTAUloids, similarly to VOCALOIDs, are virtual singers to put it simply. To make an UTAUloid, a user would record samples of themself talking/singing strings of syllables in almost any language, sometimes recording the same reclist (recording list or recite list) multiple times at different pitches to achieve a voice with a wider singing range. These collections of recordings are referred to as a voice library or voicebank.

Wouldn't it be more appropriate to have the characters implicate the company that created them (if any), rather than the software used to make them sing? Images created of them won't likely have their voice, or show anything to do with UTAU itself, and given that anyone can make a character sing using the software given any available random voicebank, it doesn't seem like an appropriate thing to tag if it's not actively used in some animation (which itself may not be reason to tag it either, but that's a separate discussion).

See vocaloid for precedent. Most UTAUloids aren't made by companies anyways but by individuals, and since fans tend to treat it as a canon the same way VOCALOID fans do, I think it's fine.

bumping this because it still applies to them and is a good way to categorize these characters, even if not strictly under copyright or any company