komeiji koishi, komeiji satori, hieda no akyuu, and motoori kosuzu (touhou) drawn by tomobe_kinuko

Danbooru

Resized to 60% of original (view original)

GinDIce

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Eh, suddenly Akyuu can see Koishi??

Levander

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GinDIce said:
Eh, suddenly Akyuu can see Koishi??

Akyuu's notes in SoPM imply that it becomes easier to see and remember Koishi if you're aware of Satori and know Koishi as her sister.