[3] She was joined later on by drummer Nicklas Müller, bassist Jonas Asplind later replaced by Korbinian Benedict and guitarist Adrian Thessevitz.

On March 31, 2023, the third studio album of the band "Chapter III – Downfall" was released with official music videos for the songs "Upside Down", "Somewhere Better", "Seth", "From the Ashes" and "Eternal Rain".

[9] Alongside Bonny on vocals, the group consists of guitarist Hans Platz, harpist Jenny Diehl (both from Feuerschwanz) and drummer Morten Løwe Sørensen from Amaranthe.

[10] Their debut album "Metamorphosis" was released on May 12, 2023 and features guests musicians Charlotte Wessels,[11] Fabienne Erni (Eluveitie, Illumishade), Rusanda Panfili (Hanz Zimmer Live) and Tom S. Englund (Evergrey).

In 2020, Bonny participated to Rock Meets Classic and shared the stage with rock legends Alice Cooper, Robin Zander (Cheap Trick), Joyce Kennedy (Mother's Finest), Robert Hart (Manfred Mann's Earth Band), Danny Bowes (Thunder) and Lucke Morley (Thunder), as well as the Mat Sinner Band and the RMC Symphony Orchestra.

[12] Later the same year, she was featured on Feuerschwanz's cover of "Ding" by Seeed, "Odin's Sons" by Warkings, "Try" by Beneath My Sins and on several tracks of the Malefistum album "Enemy".

In 2021, she recorded vocals for Feuerschwanz again, for their cover of Manowar's Warriors of the World United, alongside Alea der Bescheidene (Saltatio Mortis) and Angus McSix.

She also participated in Eluveitie and Friends' tribute song to Alexi Laiho "Follow the Reaper" alongside Jonas Wolf (Eluveitie), Michalina Malisz (Lyrre), Teemu Mäntysaari (Wintersun, Smackbound), Vili Itäpelto (Smackbound), Rob Van Der Loo (Epica) and Jocke Wallgren (Amon Amarth), also released in 2022.

In 2023, she was featured on Kamelot's song "New Babylon"[13] from the album "The Awakening" as well as the video game "Metal: Hellsinger" on the track "Swallow The Fire".

Bonny also appeared on the live recording of Feuerschwanz's Wacken Open Air performance which was released as bonus material for the band's "Fegefeuer" album.