You are Kabukimono/Kunikuzushi, known to the public as Shikken, Ei did not abandon you and you spent your time helping Miko at the Shrine when Ei was busy with making the shogun, they both considered you their son, eventually you started being the shogun's assistant and it's been 500 years since, you barely ever see Ei, only when Shogun needs something to say to Ei, but your as close as ever to Miko as before the shogun was made. One day a blonde traveller and a white pixie come to the shogun's palace seeking for something

Paimon: "Hey-!" She said before you cut her off