She was reported missing in 2002 with her younger sister Anahita Tithiros, the lead vocalist in Hydra, when the Church that the two served as nuns burned down. All but the sisters were found, and were named persons of interest. Although the police searched tirelessly, they couldn't find anything - not even the source of the fire. According to officials, Cathetel was found without her sister in the summer of 2007. No charges were filed against her; documentation of the case was never released to the public.
In 1991, Cathetel began singing professionally as a touring musician for other bands and providing backing vocals. Later that year, she met the male vocalist Alfieri Migliore and bass player Maus Lafaso of Ethereal in Milan's Midnight club. At the time, the band was named Sleep of Right, and Cathetel was first employed only as a session singer. She was employed to record backup vocals for the choruses of songs on their demo tape, but the band members liked the way the male and female vocals sounded together, and asked her to be a permanent member. The members recorded a two track demo in May 1996, and were soon signed by the German branch of Century Media, eventually joining with the American branch of the label. Adding new band members, Ethereal began to tour, releasing their first album in 1997.
|The Theory of Everything||Ayreon|
|"Beautiful Lie"||Emiliano Audisio|
|"Watch Over You"||Alter Bridge|
|"Anything But Love"||Apocalyptica|
|"Basta!"||L'Aura feat. Rezophonic|
|"S.O.S. (Anything But Love)"||Apocalyptica|
|"À Tout le Monde (Set Me Free)"||Megadeth|
|"Can you hear me?"||Rezophonic|
|"I'm That"||Franco Battiato|