In the "Civil War" crossover event, the Young Avengers travel to Los Angeles to help the Runaways fight off the government agents and Flag-Smasher. The two teams encounter Noh-Varr, who works for S.H.I.E.L.D. and attempts to capture the teenagers. Chase then hatches a plan, without the consent of the rest of the team, to sacrifice himself to the Gibborim, but the team comes to save him, which then causes the Gibborim to be obliterated. When the Runaways are accidentally time-displaced in 1907, they encounter the deceased Runaway Gertrude Yorke's parents. After defeating the Yorkes and deadly gang war, plant-manipulator Klara Prast joins the Runaways when they return to the present. Upon returning from 1907, the Runaways find themselves in New York helping the Young Avengers during the "Secret Invasion", where the Skrull Armada has invaded seeking Hulkling. Xavin pretended to be loyal to the Skrulls to protect her friends during an attack, but helps them retreat away from the battle.