Question: Among Charlotte Gainsbourg and James Iha, who was most notably being a permanent fixture of A Perfect Circle?

Context articles: The Outsider (song)
Tinted Windows (album)
Amotion
Keep Telling Myself It's Alright
Lemon Incest
James Iha
Let It Come Down (James Iha album)
A Perfect Circle Live: Featuring Stone and Echo
Blue (A Perfect Circle song)
Charlotte Gainsbourg

"The Outsider" is a song from A Perfect Circle's second album, "Thirteenth Step".
 It uses a 6/8 and 4/4 time signature.
 Two remixes of "The Outsider" were made for "aMOTION".
 James Iha made the "Frosted Yogurt mix", which uses a much more toned-down, quiet, synthesized sound than the original.
 Danny Lohner's "Apocalypse Mix" is a darker, heavier version that starts as an ambient doomscape and ends in a way that resembles a music-playback program crashing.
 The latter version was included in the soundtrack to the movie "" under the title "Resident Renholder Mix" and also in the "Prison Break" soundtrack under the title "Apocalypse mix".
 The "Resident Renholder Mix" of the song was featured in the premiere trailer for "".
 It is also featured in the film during the Alice vs. Albert Wesker battle and the ending credits.
 Additionally, the song is in the video game ""
Tinted Windows is the eponymous debut album of the American supergroup, Tinted Windows.
 Tinted Windows was formed in New York City and consists of guitarist James Iha, previously of The Smashing Pumpkins and A Perfect Circle, singer Taylor Hanson of Hanson, bassist Adam Schlesinger of Fountains of Wayne and Ivy, and Cheap Trick's Bun E. Carlos.
 The album was recorded at Stratosphere Sound Studios in New York, which Schlesinger and Iha co-own with Ivy's Andy Chase.
Amotion (stylized as aMOTION) is a DVD–CD set released by American rock band A Perfect Circle on November 16, 2004, only two weeks after the debut of the band's last album, "eMOTIVe".
 The DVD consists of music videos for singles such as "Judith", "3 Libras" and "Weak and Powerless" as well as previously unreleased videos for singles such as "Blue" and "Thinking of You".
 The CD is composed entirely of remixes of the singles from "Mer de Noms" and "Thirteenth Step".
 The songs were retooled by Danny Lohner, Joshua Eustis, Massive Attack, and James Iha among others.
 The video album debuted at number four on the SoundScan Top Music Video chart and number ten on the Australian music DVD chart.
 "aMOTION" was certified Platinum by the RIAA on 17 December 2004.
Keep Telling Myself It's Alright is the debut studio album by American rock band Ashes Divide, the solo-project by A Perfect Circle guitarist Billy Howerdel.
 While efforts towards a Howerdel solo album were started even back in his time in A Perfect Circle during touring in support of their 2003 album "Thirteenth Step", commitments to A Perfect Circle and other projects, along with some difficult recording sessions, pushed the album's release out to April 8, 2008.
 Its first single, "The Stone," entered radio circulation in January of that year.
"Lemon Incest" is a song written, composed and performed by Serge Gainsbourg in duet with his daughter Charlotte Gainsbourg.
 Recorded in 1984, the song was released as a single from Gainsbourg's album "Love on the Beat" in 1985.
 It is also available on Charlotte's 1986 album "Charlotte for Ever".
 It was controversial because of its theme, but nevertheless successful, reaching number 2 in the French charts.
James Yoshinobu Iha (井葉吉伸 , Iha Yoshinobu ) (born March 26, 1968) is an American rock musician.
 He is best known as former guitarist and co-founder of the alternative rock band The Smashing Pumpkins and for his eclectic musical projects of recent years, most notably being a permanent fixture of A Perfect Circle.
 He was most recently a member of Tinted Windows, a 1960s/1970s inspired group with members of Cheap Trick, Fountains of Wayne, and Hanson.
Let It Come Down is James Iha's first solo album.
 It was released in 1998, during which Iha was still with The Smashing Pumpkins, before the release of "Adore".
 Iha took on a more acoustic country-ish sound reminiscent of the songs he contributed to the Pumpkins, notably shying away from the darker sound of Billy Corgan's songwriting.
A Perfect Circle Live: Featuring Stone and Echo is a live box set by American rock supergroup, A Perfect Circle.
 It was released via the band's own label, A Perfect Circle Entertainment, on November 26, 2013, a week after the release of the band's greatest hits album, "Three Sixty".
"Blue" is a song by American rock band A Perfect Circle.
 It was the third single from the band's second studio album, "Thirteenth Step", behind the releases of the singles "Weak and Powerless" and "The Outsider".
 While not as successful as the prior two singles, which crossed over into the "Billboard" Hot 100 charts and hit the top 5 of the Mainstream Rock charts, the band was still a moderate success, peaking at number 19 on the latter chart.
 A remix version, "Blue (Bird Shake mix)", was created by guitarist James Iha and released on the band's compilation album "Amotion" as well, and also received radio airplay.
Charlotte Lucy Gainsbourg (born 21 July 1971) is a British-French actress and singer.
 She is the daughter of English actress Jane Birkin and French singer and songwriter Serge Gainsbourg.
 After making her musical debut with her father on the song "Lemon Incest" at the age of 12, she released an album with her father at the age of 15.
 More than 20 years passed before she released three albums as an adult ("", "IRM" and "Stage Whisper") to commercial and critical success.
 Gainsbourg has also appeared in many films, including several directed by Lars von Trier, and has received both a César Award and the Cannes Film Festival Best Actress Award.