Serdar has the same facial structure as Remington Harris. According to his Sim DNA in SimPE, his hair was brown before it turned grey. Like all cafeteria chefs and unlike other NPCs and townies, Serdar is overweight.
His name is randomized when La Fiesta Tech is generated. The name "Serdar Wilkie" is only referenced in the game files. Serdar has a Lifetime want that was removed prior to release.