If you're looking for places to add in characters, please take a look at the FAMILY TREE!
Right now we're definitely looking for more of the youngest generation. Gabriel (hippotherapist) has five, Cassandra (satinandsilk) has four bio and two adopted, Caius (sodecadent) has five bio and one (female) adopted, and Aurelia (organizing) has two bio.
Gabriel and Caius are also both looking for their partners, I believe.