Wren Rome is a pre-made deceased Sim who once lived in Barnacle Bay. He died of Old Age and his remains are in the Barnacle Boneyard. In his bio it says that he's Rose Rome's great-great-great-uncle, but since they don't appear on each other's family tree, it is uncertain. Like every other deceased Sim in Barnacle Bay, he has a pale green skin and gray hair. It is possible his name is a play on the phrase, "When in Rome".
This Sim can be resurrected with ambrosia or with the Oh My Ghost! opportunity.
See Resurrecting tips.