She joined WACK in 2016 as a member of SiS. After SiS's sudden disbandment, she joined GANG PARADE, then joined PARADISES after GANG PARADE split into two groups in 2020. She then joined GO TO THE BEDS in 2021 as part of an all-member trade, before the two units were eventually merged back into GANG PARADE in 2022.
From August 31st to September 4th, 2016, Terashima Yuka participated in the BiS Reformation Audition, under the temporary name "Terayama Yufu".
SiS' debut live took place on September 26th, where Yuka performed with the stage name "Sono Shion".
Just one day after SiS' debut performance, the group was disbanded on September 26th.
Terashim Yuka's debut single with GANG PARADE, Plastic 2 Mercy, was released on December 27th, 2016.
Yuka's debut album with GANG PARADE, GANG PARADE takes themselves higher!!, was released on November 21st, 2017.
In December, Terashima Yuka ranked 14th in the WACK General Election.
On October 16th, 2018, Terashima Yuka modelled for NEGLECT ADULT PATiENTS at Amazon Fashion Week.
In November 2018, Yuka began posting a weekly series of film review column for the website "Storywriter", titled "Soredemo eiga wa, subarashii." It later changed its name to “Kyou wa sabotte eiga wo mi ni iku” and adjusted its format to be more specific to the film.
On April 1st, Yuka's first EP as a member of PARADISES, G/P, was released.
From March 21st until March 27th, Terashima Yuka participated in the WACK AUDiTiON CAMP 2021 as a mentor. This was the second time that she mentored in an audition.
In mid-June, Yuka, along with every other active WACK member at the time, joined the shuffle unit, Dogenzaka43. Her only single as part of the group, Kyouniku Jakushoku ~Tsuyoi Yatsura wo Kucchimae~, was released on June 16th.
During WACK presents DREAMLIGHTS in TIF on October 2nd, Watanabe Junnosuke announced that all members of PARADISES and GO TO THE BEDS would switch members. As such, Terashima, along with all her groupmates, immediately went on hiatus from PARADISES and joined GO TO THE BEDS instead. As part of GO TO THE BEDS, Terashima featured on the joint EP, G⇔P.
It was revealed on December 27th that Terashima Yuka had ranked in third place in the VOTE! WACK SELECT 7 general election, securing her a place in a new group that would be produced by Kashiwagi Yuki.
On January 1st, GANG PARADE announced their reformation, and Terashima Yuka rejoined. As GO TO THE BEDS and PARADISES were now merged back into one singular unit, knowledge on her future with either unit was uncertain, though it appears that both groups are now inactive.
Yuka's first single after rejoining GANG PARADE, PARADE GOES ON, will be released on March 9th.
During the BiS Reformation Audition, when asked if there was anything interesting about herself she mentioned that she's bisexual.
- Stage Name: Terashima Yuka (テラシマユウカ)
- Other Names: Sono Shion (ソンシオン)
- WACK Audition Name: Terayama Yufu (テラヤマユフ)
- Birth Date: November 5, 1998 (age 23)
- Birthplace: Osaka, Japan
- Height: 168cm
- Nickname: Yuyu (ユユ)
- Western Zodiac: Scorpio
- WACK status:
- 2016.09.04: Joined SiS
- 2016.09.26: SiS disbands
- 2016.11.06: Joined GANG PARADE
- 2020.03.28: Joined PARADISES
- 2020.05.22: GANG PARADE went on indefinite hiatus
- 2021.10.02: Went on hiatus from PARADISES and joined GO TO THE BEDS
- 2022.01.01: GANG PARADE resumed activities
- GANG PARADE Colour: ■ Purple
- WACK Groups:
- Overall Time in WACK: 5 Years, 4 Months, 22 Days
- [2018.11.20 - 2019.06.25] Storywriter.tokyo column: Terashima Yuka no "Soredemo eiga wa, subarashii" (テラシマユウカの「それでも映画は、素晴らしい。」; Terashima Yuka's "Still, Movies Are Wonderful")
- [2019.06.25-] Storywriter.tokyo column: “Kyou wa sabotte eiga wo mi ni iku” (今日はさぼって映画をみにいく; Today I’ll skip out and go see a movie)
- [2017.02.07] WHO KiLLED IDOL? -SiS Shoumetsu no Uta-
- [2017.07.07] THE DOCUMENTARY OF WACK AUDiTiON ~Orchestra Monogatari~
- [2018.02.18] THE IDOL CANNONBALL RUN 2017
- [2018.12.11] GANG PARADE oneman live at Zepp Tokyo
- [2019.09.04] CHALLENGE the LIMIT TOUR
- [2020.02.29] PARADE GOES ON TOUR at Nakano Sunplaza
- [2019.08.25 - 09.28] Playhouse
- Plastic 2 Mercy (2016): WINTER SONG
- Beyond the Mountain: Peninsula
- GANG PARADE takes themselves higher!!: Are you kidding??, I need you I love you I want you
- LAST GANG PARADE: Jealousy Marionette, PALET
- BRAND NEW PARADE: Dreamer
- THE MUSIC AND THE GAME CREATES MAGIC: Hontou ni Boku ga Ikitakatta no Wakonnan ja nee, fxxk your disco
- LOVE PARADE: Youthful Hero
- G/P: Kimochiii Kotoshitai!
- GO TO THE BEDS: EGOIST
- Loves otters and is said to resemble one.
- Her BiS audition name (and potentially her GANG PARADE stage name) was a parody of Terashima Yufu. She shares her audition name with NOW EMPiRE and Saibi Ao, the latter whom she also mentored during the audition camp.
- Is the tallest member of GANG PARADE.
- Shares her birthday with Naruhaworld.
- Her SiS stage name was a reference to the film director of the same name.
- Is the only SiS transfer to join PARADISES instead of GO TO THE BEDS when GANG PARADE split.
- Was the only PARADISES member to have never been part of WAgg before the addition of member Ca Non.