Nico and Luzt Ulbrich dated from 1974 to 1979 while she was living in Frnace with Phillipe Garrel. Lutz Ulbrich was a musician and a Nico fan and he was only 22 when they started meeting.
Luzt (or Lüül) tried heroin and became an addic, in fact Luul said that "honestly, I was more dependent on Nico than on the drug itself. I just took it because Nico did". He wanted to be as the same level Nico was and he wanted to understand what was behind it all.
By 1974 he went to live with Nico and Phillipe Garrel at Rue de Richelieu and he had some fights with Phillipe Garrel, who was very jealous but by that time acted like a brother to Nico rather than a partner.
Once Nico thew Luul out of Phillipe Garrel`s flat telling him "You German Pig", he took it quite serious at that time and later of their relationship, they had fights. The worst fight it took place in New York and meant the end of their relationship. She hurled an iron to him and he tried to throttle her, police had to come and separated them, it was at the Chelsea Hotel where just two doors further Sid Vicious had killed his wife Nancy.