He remained in her body so she could survive but refused to awaken. Galahad decried Chaldea's brutal experiments, briefly taking over Mash's body in an attempt to escape, but when Mash began to resist his control, he stopped. Galahad realized that she would die if he left her.
While the project succeeded in summoning and binding a spirit to Mash, the spirit failed to awaken. In 2010, when Mash was aged 10, Chaldea performed their second Heroic Spirit summoning.