Surprisingly, the protagonist's past is tightly sealed.

In the Touhou Project universe, there are beings who can delve into others' pasts. However... Satori: She's a youkai who can read minds and memories due to her species, but to read memories deep within the heart, one needs to inflict strong trauma on the other party... For some reason, the protagonist doesn't fear her much, leading to failure. (The protagonist is friends with everyone in Gensokyo, from common fairies to the goddess of hell. From the protagonist's perspective, is there any reason to fear her?) Eiki: She possesses a tool (the Mirror of Hisou) that can uncover someone's entire past due to her profession... However, for some unknown reason, the tool's abilities don't work on the protagonist, resulting in failure.