Gleb Savchenko asked a Los Angeles court for temporary sole legal and physical custody of 15-year-old Olivia, saying she wants to stay in Los Angeles rather than return to Hong Kong.
Court papers say ex-wife Elena Samodanova was supposed to take Olivia and Zlata to Hong Kong for 1 year in 2023, with a return deadline of June 30, 2024, but did not bring them back.
Savchenko alleges Samodanova has since made Hong Kong a permanent base by obtaining residency, enrolling the girls in private school, getting engaged and having another child there.
He also claims she took the children on trips including Russia and Vietnam over his objections and that the extended stay has damaged his relationship with them; Samodanova has not publicly responded.
The former couple has been ordered to mediate on August 5, with a formal custody hearing expected later as the cross-border dispute widens.