忍物語より、日傘星雨ちゃんです。

下の名前の読み方、「せいう」でも「ほしあめ」でもいいらしいですね〜
私は「せいう」って呼んでます(^ω^)/

It's Higasa Seiu-chan from Shinobumonogatari.

The pronounciation of her given name is "Seiu", but I think "Hoshiame" (Star-Rain) also sounds nice, doesn't it~?.
I'll call her "Seiu". (^ω^)/