A calm and sweet elder sister. 
Her main feature are her cat ears.

The science-fiction action story follows girls who fight with weird entities nicknamed "mushi" (bugs) and survive in a world of red fog. 
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(Source: Anime News Network)
Based on Tatsuki's winning entry from the '24th 3D Anime Contest' in 2012 of the same name.

Tatsuki's winning entry from the '24th 3D Anime Contest' in 2012, which will become a TV anime in 2019. 

Follows a group of girls surviving in a post-apocalyptic world

Ritsu