>>84867120Lia wouldn't make a thematic outfit just because of Final Fantasy. It has to be a generic outfit that she can use in all circumstances.
Pekora is different because Hololive has millions of dollars to invest on artists, so they can in fact debut outfits every 6 months for different seasons and for events.
Ironmouse debuts outfits every month but for the majority of vtubers commissioning outfits is expensive and makes no sense to do it that often.