...And I'm stumped on how to adapt this. "Kyo" is a killer, even when I try to split it up into "kee" and "yoh".

Well, I gave it a go - even though that's really stretching it.

If only it was Rudolf and not Matikan...

(aquiescence is also an option, but that's even more of an ass-pull).

NNescio said:

"Kyo" is a killer, even when I try to split it up into "kee" and "yoh".

Cygames isn't keen on risking their payoffs over an unauthorised umamusume.

could work for that, but again, stretching to breaking point...

Paracite said:

Well, I gave it a go - even though that's really stretching it.

Thanks. Better than any option I had in mind.

Paracite said:

If only it was Rudolf and not Matikan...

Yeah, Rudolf permits a greater degree of flexibility when translating.

Paracite said:

(aquiescence is also an option, but that's even more of an ass-pull).

Cygames isn't keen on risking their payoffs over an unauthorised umamusume.

could work for that, but again, stretching to breaking point...

Both do have the advantage of keeping initial /k/ though, unlike the coda /k/ on "ack". Though, yeah, comes with their own trade-offs of stretching the text further.