Juan Darer is a pre-made male Sim from The Sims 3: Ambitions who is an elder. He is often one of the first Sims in Twinbrook to die of old age. He is at level 4 in painting, level 1 in sculpting, level 2 in the athletic skill and at level 6 in inventing. He is best friends forever with Harwood Clay and is the ex-boyfriend of Milly Pidgin.
He lives in a barn besides the burnt down remains of his house at 27 Herring Ranch Road. It's implied that he lost his house to an old Earthquake or due to a fire from a failed invention which may have caused the deaths of both Lacy Darer and Macy Clay. He has a lot of artistic objects on his lot. Juan lives alone atop a hill and there aren't many houses or neighbors around.
He is one of the few premade Sims to have a red complexion, possibly alluding to the "burnt" look from the fire. His name is a play on "Wanderer" which matches his gypsy-like appearance. Juan has gray roots but his hair color is black. It's possible that he dyes it. He shares his surname with Lacy Darer. It is speculated that Lacy Darer may be his ex-wife.
It is possible he is inspired by the character of Emmett "Doc" Brown from the Back to the Future franchise, as Doc Brown is known to be a crazy inventor who moved into his garage after his home burnt down.