Witches, look like anybody. Wican, if I have the spelling correct, is a belief, like a religion. Witches don't exist but if they did there eyes would be a dot and they would change colour including fire, those eyes would make your skin boil and your heart overbeat.
Paint your apartment purple and buy all her posters and the furniture and flooring. Also have your kitchen done with the same design and voila! It should look similar to Monica's apartment without you looking like a freaky apartment stalker!