As a tertiary character, you are accepting that you may be needed infrequently. You can be on call and ready to voice this character at a moments notice, though this can realistically happen at any time.

In the You Shou Yan manhua, there is the occasional chapter that features someone playing a You Shou Yan mobile game! There are not many chapters like this in the Manhua, but they are certainly there.

As the Player, any average voice will do! Not looking for anything over the top, just a general person playing a fun (and cruel) little game.