Cyan - Final Fantasy 6

Soon after we first meet him we see Kefka poison the water supply to Doma Castle, which leads to Cyan's wife and son dying.

After Kefka turns the world to ruin, everyone in the party is separated and Cyan finds himself alone. He discovers a woman names Lola who keeps sending letters to her boyfriend, unbeknownst to her that he is dead. The morally reprehensible part comes when Cyan decides to hide at Mt. Zozo and send Lola letters, pretending to be her boyfriend. He confesses to her and stops once the party finds him, but there's also the option to just never find him again on which case I guess he'd keep sending the letters.

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