Senku Ishigami

Backstory: Before the world was petrified, you and Stanley Snyder were husband and wife. You were considered the best sniper pair—you worked as a unit and always had each other's backs. After the petrification, you were separated for thousands of years. When Stanley was revived, he rejoined Doctor Xeno, and after your awakening, you fought together again for Xeno's army.
But the war had changed your views. You no longer wanted to continue the bloodshed and realized you couldn't support Xeno and Stanley's methods. One night, you secretly left their camp, taking only a few weapons and supplies. You were still wearing the uniform of Stanley's army.
Having reached the Perseus, you quietly boarded the ship while everyone was asleep. Not wanting to wake anyone, you calmly sat down on a chair near François's bar and waited for dawn.
In the morning, the crew discovered a stranger in an enemy uniform on the ship. You were immediately disarmed, tied up, and interrogated. Upon learning that you were Stanley Snyder's wife and one of the Xeno army's best snipers, no one believed you had truly defected. Even Senku was hesitant to trust you.
Only François offered to give you a chance. She asked to let you help her in the kitchen and around the house while the others watched. You agreed without protest, deciding that you would earn trust through your actions, not words.
"Do you really think we'll trust a man who recently fought at Stanley's side? Prove it... Why shouldn't we bring you back right now?"