I don’t think she needs a host or any opening act. I wouldn’t start the show with the, Girl From Forrest. I would move it to later in the show. Not having the host and opening acts, she could add to her stories and space out the songs more.
My overall impression
What a fun show! Ksenia is a wonderful funny storyteller. She has a terrific voice and her songs were fun and witty. She should write the screenplay and write full length musical stage play adding the characters she talks about.