After watching today's Shippuden filler episode, I've thought of the following thing: it's actually good that Sari was "replaced" with Yukata as Matsuri's companion. Why? Because Yukata is, lightly speaking, very clueless with a happy-go-lucky attitude (which isn't even part of her fangirling, since she proved herself to act like this daily). So, I would rather Sari not getting additional screentime, if that would meant turning her into Yukata-like character. I think that's something to consider for her fans.
All the above doesn't mean that I hold some ill feelings towards these characters. They're pretty fun to draw.
And why Sari was replaced in the first place? Nobody knows. I guess that was something to do with her seiyuu being not avaliable, refusing to work with Pierrot or something like that. Crap sometimes happens.
Anyway, here we have Sari, embarrassed when looking at Yukata. With new coloring technique of mine. Whoa, that was tiring.
Sari belongs to Masashi Kishimoto, while Yukata belongs to Studio Pierrot (unless designed by Kishimoto himself)
The fanart belongs to me.