From the Fate/Grand Order smartphone game, the Saber-class servant Altria Pendragon is in her casual outfit from the from Singularity Subspecies I: Malignant Quarantined Demonic Realm: Shinjuku Phantom Incident.
She comes with a standard expression and a blushing expression as though saying her "H-How long have you been standing there?" line. Her Noble Phantasm Excalibur Morgan and a hamburger are included as optional parts. Be sure to add this slightly different version of the blackened King of Knights to your collection!