Saiki Kusuo no Sai Nan Wikia
Yumehara Chiyo
Character Name
Full Name Yumehara Chiyo
Kanji 夢原 知予
Furigana ゆめはら ちよ
Personal Info
Age 16 years old
Birthday June 11
Sign ♊️ (Gemini)
Blood type B
Gender Female
Height 158 cm
Weight Unknown
Affiliation Occult Club (Member)
Occupation Student
School PK Academy
  • Year 2 Class 3.png
  • Year 3 Class 1.png (Reawakened)
Novel Debut
Manga Debut Chapter 5
Anime Debut Season 1 Episode 2
English Voice Jill Harris
Japanese Voice Tamura Yukari

Chiyo Yumehara (夢原 知予, ゆめはら ちよ lit. Yumehara Chiyo) is a romantic and dreamy girl who has had a lot of painful love experiences.


Yumehara Chiyo Full Design.png

Chiyo is a petite girl with short orange-brown hair tied with a pink hairband. In school, she wears the standard female uniform of PK Academy.


Chiyo is a romantic girl who would do anything for love, as proven by her many attempts to get Kusuo to notice her before moving on to Takeru. After breaking up with Takeru, she starts chasing Kusuo again only to later fall for Shun instead (with the help of Kusuo). However, due to the instability of her feelings towards boys, it is no surprise when Mikoto states that she will become a 4-time divorcee.


Chiyo, as Mikoto has said, has an extreme unluckiness when it comes to relationships and boys. She once dated Akanishi Shinichi, who repeatedly borrowed money from her, and Shinoda Takeru, who had a bad attitude and stinky feet as well as really bad habits which resulted in them breaking up after she felt as though they "lost their spark".

Later on during the trip to Okinawa trip, she got very depressed after everyone's lack luster reaction to her swimsuit, and after getting made fun of by two guys at the beach, Kaidou Shun stood up for her and even got into a fight with the men, causing her to fall in love with him.


  • (Volume 8 Cover) If you are afraid of love, just gather your courage!


  • Her name is from the word Prophetic Dreams (予知夢, Yochi Yume).
  • Her guardian spirit is a politician.[1]
  • Her aura is made up of tiny heart.[2]
  • She maintained a website during her 3rd year of junior high which contained a novel she'd written with herself as the protagonist (it has been closed).[3]
  • She ranks #139 out of 181 students.
  • It's possible she has become a slight chuunibyou after falling in love with Shun, which is displayed when she claims her hairband is a "seal" when she's alone.


  1. Saiki Kusuo no Psi-nan Chapter 18
  2. Saiki Kusuo no Psi-nan Chapter 167
  3. TV Tokyo


v · e 2nd Year
Class 1-1.png: Kihachi Bunta · Nishi Soujirou · Sugiyama Haruo · Tanaka Ichirou
Class 2-2.png: Itano Yoriko · Ooshima Yuuji · Oohori Kouichi · Satou Hiroshi · Shinoda Takeru · Nakanishi Shinya · Maeda Takayuki · Suzumiya Hii · Toritsuka Reita
Class 3-3.png: Aiura Mikoto · Akechi Touma · Hairo Kineshi · Kaidou Shun · Kuboyasu Aren · Mera Chisato · Murata Shuuji · Nendou Riki · Saiki Kusuo · Saiko Metori · Sawakita · Takahashi · Teruhashi Kokomi · Yokota Jaga · Yumehara Chiyo · Zolbe Kageyukouji Saberlight
Class 4-4.png: Haruno Akio · Hotei Tomotaka · Tanihara Kenji
Class 5-5.png: Kumi Kouji · Matsuda Ippei · Mikami Aiko · Mishima Nobuaki