Question: What was the name used by the singer whose debut mini-album was Walkin' when she appeared as a contestant on "King of Mask Singer"?

Context articles: Walkin' (EP)
Suran (singer)
The Mask Singer (season 3)
The Vivid Color
Colourbox (1983 album)
Love Style
The Mask Singer (season 1)
The Mask Singer (season 2)
The Mask Singer
Kim Seung-hyun (basketball)

Walkin' is the debut mini-album by South Korean singer Suran.
 It was released on June 2, 2017, by Million Market and distribuited by LOEN Entertainment.
 It consists of five songs, including "Wine" featuring rapper Changmo, previously released as a digital single, and the title track "1+1=0" featuring singer Dean.
Shin Su-ran (Hangul: 신수란), also known by her stage names Elena (Hangul: 엘에나) and Baily Shoo (Hangul: 베일리 슈), and better known by the mononym Suran (Hangul: 수란), is a South Korean singer-songwriter and record producer.
 She debuted as part of the duo, Lodia, on July 9, 2014, with the single "I Got A Feeling".
 In 2017, she has also appeared on MBC's "King of Mask Singer" (episodes 93–94) as a contestant named "Skip to the End, Hello".
The Mask Singer Season 3 (Thai: The Mask Singer หน้ากากนักร้อง 3 ) is a Thai singing competition program presented by Kan Kantathavorn.
 It airs on Workpoint TV on Thursday at 20:15, starting from September 7, 2017
The Vivid Color is the debut mini-album released by the Japanese band Vivid.
 It was released in two different versions: a limited CD+DVD edition and a regular CD only edition.
 It is the band's first release to be available in two versions.
 The limited edition came with a DVD of the PV for the mini-album's main promotional track "69-II".
 The regular edition came with a different track list and two extra tracks, "Kimi Koi" and "Trail of Tears".
 The mini-album reached number 34 on the Oricon weekly charts, where it charted for two weeks, selling 4,125 copies.
Colourbox is the debut mini-album from Colourbox, released by 4AD in November 1983.
 "MAD 315" is the album's catalogue number, used to distinguish it from their 1985 self-titled album, although the mini-album is sometimes referred to as "Horses Fucking" due to the cover image.
 It was reissued on CD in 1986 with four additional tracks compiled from the band's singles.
Love Style is the debut mini-album by South Korean boy band Boyfriend.
 The mini-album was released digitally on June 13, 2012.
 Followed by the release of the physical album on June 14, 2012.
The Mask Singer (Thai: The Mask Singer หน้ากากนักร้อง ) is a Thai singing competition program presented by Kan Kantathavorn.
 It airs on Workpoint TV every Thursday at 20:00, starting from October 6, 2016
The Mask Singer Season 2 (Thai: The Mask Singer หน้ากากนักร้อง 2 ) is a Thai singing competition program presented by Kan Kantathavorn.
 It airs on Workpoint TV on Thursday at 20:00, starting from April 6, 2017
The Mask Singer (Thai: เดอะแมสก์ซิงเงอร์ หน้ากากนักร้อง ), also known as (The Mask Singer หน้ากากนักร้อง), is a Thai singing competition program presented by Kan Kantathavorn.
 It was first aired on October 6, 2016 and runs every Thursday at 8:15 p.m. on Workpoint TV
Kim Seung-hyun (; born November 23, 1978), is a South Korean basketball player.
 He was a cast member in the variety show "Real Men".
 In February 2017, he appeared on MBC's variety show "King of Mask Singer" (episode 99) as a contestant.