Seiu is a member of the basketball team with Suruga Kanbaru. During her second year, she was the vice-captain. After Suruga retired due to the Rainy Devil's effects, Seiu became the captain. 

Seiu is a student at Naoetsu High and is in the same year as Kanbaru. She is often blunt, calling Kanbaru an idiot for having bad grades. As a friend of Kanbaru and fellow teammate of the basketball team, Kanbaru and Seiu are presumed to be somewhat close friends. As Kanbaru's friend, she has given her the nickname "Ruga." Initially, Seiu seems to be a background character, though she has a more prominent role in Monster Season.

~!In Shinobumonogatari, her name is read as "Seiu," though in Yoimonogatari, it is later read as "Hoshiame," where both having similar meanings. This was later brought up in Amarimonogatari, and it is said that, "both readings are correct, you can read them both ways." There has been no further info about why Higasa's name is like this.!~


Third and “Final Season” of the Monogatari Series, part 4/5. Contains the arcs Mayoi Hell, Hitagi Rendezvous, and Ougi Dark from the Owarimonogatari light novels.
 
Koyomi wakes up to see Mayoi Hachikuji before him, the girl who supposedly had gone to the afterlife. She tells Koyomi that they are currently in Avichi, the lowest levels of hell. Koyomi is dubious of how Mayoi knew about the exact timing of his death and which hell he would drop into, when Mayoi tells him that she was there to pick him up by the request of a certain individual.
 
(Source: Aniplex)

Second season of the Monogatari Series, part 2/2. Contains the arc Suruga Devil from the Hanamonogatari light novel.
 
Now that Koyomi Araragi and Hitagi Senjougahara have graduated, few familiar faces remain at Naoetsu Private High School. One of them is Suruga Kanbaru, holder of the Monkey's Paw. When she begins to hear talk of a mysterious being known as the "Devil," who will magically solve any problem, she immediately thinks these rumors are about her and decides to investigate.
 
Kanbaru discovers the Devil is actually Rouka Numachi, a former rival who provides free advice to those who seek her out now that she can no longer play basketball due to a leg injury. As a collector of misfortune, Numachi enjoys relieving her clients' stress by giving them false hope. Though Kanbaru sees no real harm being done, she reprimands Rouka for lying and heads home, relieved she is not the cause of the rumors. But the next morning, when she finds that her left hand has reverted back to its original form, she may have a reason to worry after all.

__Height:__ 157 cm 

[Agency Profile](https://inari-inc.com/talent/yoko-hikasa/) | [Blog](https://ameblo.jp/hikasayoko-official) | [Instagram](https://www.instagram.com/hikasayoko_official/) | [Threads](https://www.threads.net/@hikasayoko_official) | [(Old) Twitter](https://twitter.com/hikasayokoSP)

Co-hosted the popular weekly radio show Odoroki Sentai Momonoki Five (おどろき戦隊モモノキファイブ) with fellow seiyuu [Eriko Nakamura](https://anilist.co/staff/103983) from 2009 to 2017.
She got married to a person from outside the industry in 2015.
On September 5, 2024, she announced that she was starting her own voice talent agency, [i.nari](https://inari-inc.com/), which would also be representing her going forward.

__Non-anime roles:__
- Neve - Goddess of Victory: Nikke (VG)
- Red Hood - Goddess of Victory: Nikke (VG)
- Celia - Tevi (VG)
- Emilie - Genshin Impact (VG)
- Judith Lanster - The Legend of Heroes Series (VG)
- Brigitta Lycaon - Metaphor: ReFantazio (VG)
- Vita - Honkai Impact 3rd (VG)
- Saeki Kazuko - YanOta: The Delinquent and the Otaku (Drama CD)
- Evelyn Chevalier - Zenless Zone Zero (VG)

The sequel to the 'Final Season' story arc of the Monogatari series. 

From the past to the future, their story continues. 

Now that he has graduated from high school, Koyomi Araragi’s story ends here. His story is truly over now, but the stories of the girls Koyomi saved - their stories - are not over yet. 

This is the prequel or sequel to their stories and their struggles. 

(Source: Monogatari Series USA Official Website)

Third season of the Monogatari Series, part 2/5. Adapts the arcs Koyomi Stone, Koyomi Flower, Koyomi Sand, Koyomi Water, Koyomi Wind, Koyomi Tree, Koyomi Tea, Koyomi Mountain, Koyomi Torus, Koyomi Seed, Koyomi Nothing, and Koyomi Dead from the Koyomimonogatari light novel.
 
“You’re looking for a horror story? I wish I got one for you." Untold stories… one per month for one year… Taking place between other Monogatari stories, a chapter not yet told surrounds Koyomi Araragi and the strange happenings he gets pulled into over the course of a year. With one episode told per month, the story unravels in this 12 episode-long series of shorts.
 
(Source: Aniplex)
 
Premiered on the Japan-exclusive Koyomimonogatari mobile app.

Our sorry hero, his reformed girlfriend, and the amnesiac class president have all graduated from their high school out in the boondocks, and self-described Sapphist and ex-basketball ace Kanbaru, retired by reason of an “injury,” is starting her senior year and the narrator of this volume—her voice far more introspective than the smutty jock’s we thought we knew.
 
Bereft of the company of her beloved mentors, the only other person around her with any working knowledge of aberrations the junior Ougi Oshino, apparently a relative of the Hawaiian-shirted folklorist, she feels a bit alone and blue, and sick with dread that the devil residing in her left arm courtesy of the Monkey’s Paw might act up again while she sleeps.
 
Investigating a rumour that she fears might lead back to her, the former star ends up peering into an abyss of negativity called Rouka. Trapped in a pit the like of which could only be escaped by the one girl who was able to pull off slam-dunks in her basketball nationals, can the penitent Kanbaru, however, still be aggressive?
 
(Source: Kodansha USA)

It's chic to go saving a girl who has nothing to do with you every once in a while. Female students from Naoetsu High School have gone missing one after the other. When the mummified bodies of the girls are discovered, there's a very distinctive marking left on the napes of their necks...? Koyomi Araragi, now a first-year university student, goes on the move to track down the culprit! The curtain opens on Monogatari Series: Monster Season!
 
(Source: Kodansha, translated)

"It's an unfashionable monster. Even vampires are no match for them."
 
Araragi Koyomi was consulted by his friend, Hamukai Meniko, about her falling out with her boyfriend.
He himself had just been told by Hitagi Senjougahara that she is breaking up with him — along with an apology.
Koyomi deduced that this commotion was the work of oddity.
He goes to Oshino Ougi, an expert in the field of oddities.
 
This modern day oddity! Oddity! Oddity!
 
(Source: Kodansha, translated)

Araragi Koyomi's university arc (Monster Season)
 
Oddities x Mystery
 
"Do you still feel like playing detective?"
 
From his kouhai at Naoetsu Highschool, Higasa Hoshiame, comes rumours of the kidnapping of an elementary school girl.
 
Araragi Koyomi, now a first-year university student, along with Hachikuji Mayoi, Oshino Shinobu and Ononoki Yotsugi begin investigating, but...!
 
This modern day oddity! Oddity! Oddity!
 
In the Evening darkness, youth shines brightly.
 
(Source: Kodansha, translated)

Seiu Higasa