http://fireemblem.wikia.com/wiki/Gerome
Gerome was once a happy, but somewhat shy child. He had pride in his parents and bonded well with Minerva, but his parents were often off fighting Risen to protect their country. Gerome eventually lost his father, and later his mother. After Cherche's death, Minerva flew back to Gerome and stayed with him for the rest of his life. He also received Cherche's wedding ring and has worn it ever since. Eventually, Gerome receives word from Lucina that she and the other children will return to the past to prevent the ruinous future. Gerome, however, felt that no matter how hard they try, destiny cannot be changed. While he believes that the past cannot be changed, he accompanies them anyways so that he can release Minerva into the wild, as most of the wyverns in his time had been killed. In his supports with Lucina it is revealed he lent her the mask that she used to hide her identity.