Known as the warabe yuusai, seventeen-year-old Touko is the leader of the Yume Tsukai.

As Rinko's older sister, she took over their father's practice after he was killed during a battle. Somewhat anemic, she spends most of her time sleeping in the odd toyshop where they are based from. Because she mostly stays at the shop and wears an overall skirt and geta, Rinko dubs her a hermit and wishes her sister would get out more.

Touko wears her father's kitsune noh mask, and doesn't go anywhere without it. She even bathes and sleeps with it.

~!Because of her powers to see into other people's dreams, Touko's left eye serves as a window in which her clients can see their dreams through. She can only cry tears in her right eye.!~

(Source: Wikipedia) 

Togawa is dating the resident class weirdo, and their relationship is even more non-standard than she expected! They've never even kissed, but he's tasted her tears, cleaned her ears, and shaved the nape of her neck! And also walked her through a Buddhist ritual that opened her third eye and brought her spiritual peace and a good night's sleep. It is indeed a wonder, in more ways than one, that she can't help but feel drawn to him. 
(Source: J-Novel Club)

An ordinary, quiet town is shaken by a series of bizarre happenings brought about by the darkness in human hearts. There are no solutions in the real world: Only "Dream Messengers" can find the answers. Dream messengers connect the fabulous with the real and control the power of dreams. Their leader, Touko Mishima, works with 8 other messengers using the powers given by an old spell and a toy made by Touko's father.
 
Touko, her younger sister Rinko, Hajime Tachibana, who loves young girls, and the six other Dream Messengers are given the names of days or stars - Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Raff and Keito.

When people dream, they express their utmost desires and emotions within the confines of their mind; but when their strong emotions cross the border into reality, the dream can turn into an uncontrollable nightmare. 
Touko and Rinko are sisters known as "yume tsukai" (dream users), and their job is to take care of these nightmares. Using toys as weapons, the girls must both destroy the nightmare and return the dream to its rightful owner before the nightmare does any sort of serious damage. 
Have no fear, Touko and Rinko are here! 
(Source: Anime-Planet)

__Non-anime roles:__
- Shenhe - Genshin Impact (VG)
- Sugar - Goddess of Victory: Nikke (VG)
- Dikke - Reverse: 1999 (VG)

Takaomi and Arika meet a young girl named Tsugumi Yoshimoto who has been asleep since an incident that occurred when she was a child. What happened in her past? And can she be cured? The couple try to solve this mystery with the help of the Mishima sisters -- Toko and Rinko, who are 'Yumetsukais' (dream messengers) with the uncanny ability to control dreams. What is the truth behind this mystery? 
This is a prelude to Riichi Ueshiba's next work, "Yumetsukai." The Mishima sisters make a comeback as main characters in "Yumetsukai." 
(from Kodan Club)