A victim, known as only as Girl E, said she thought she loved her attacker, Renato Balog, but he soon became "nasty".
I felt very confused and embarrassed. I was ashamed in myself for doing these things with him even though I didn't want to do them.
Another victim, known as Girl A, said:
I felt upset and scared, the boys told me if I told police they would kill me and my family and I thought they would.
When we had to go to court I had to go to London and stay there. It was proper hard. I cried. It was hard to talk.
I was worried people would laugh at me and wouldn't be able to understand me because of how I speak and I was embarrassed about talking.
After I left court it felt like a long time waiting and felt like nothing was happening. I thought that the boys were going to get out and get me.
I am still frightened that they will kill me when they get out.
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Armed police have carried out a raid apparently linked to Wednesday's deadly terror attack in Westminster.
Cheryl Grimmer vanished from inside a beach shower block in Wollongong, Australia, in 1970, when she was just three.
Pc Keith Palmer was on the front line and because of his actions, the Westminster attacker was unable to kill anyone else.