Which anime does the off-court girl come from?

Characters in Japanese anime Detective Conan. I have some connection with Shiliang Zhenchun, staying in a hotel and asking Shiliang to call herself "an off-site sister". Its identity and other specific circumstances are unknown.

Off-court sister (also translated as "out-of-range sister"), whose real name is unknown, is a mysterious figure.

Eye shadow is similar to Akai Shuuichi and Sera Masumi. Seems to be very weak, and Sera Masumi lived in a hotel. Edogawa Conan, who introduced Shiliang, didn't fully trust him, saying, "If he can't be the expected candidate, we must leave at once and explore new fields."

Basic information

Gender: Female

Age: unknown (junior high school students look like)

Appearance: Similar to Haiyuan Ai, eye shadow and pupil color (both dark green) are similar to those of Akai Shuuichi and Sera Masumi.

Address: Hyde Puulaid Hotel (from file 899)

Debut: Vol.83 File.4 (general file.876) Love novelist, TV 759 love novel with amazing ending (Part I).

Seiyuu: Atsuko Tanaka