Strangely when his relationships are viewed in SimPE, Chaz recognizes Marla Biggs as his sister and vice-versa. They do not appear on one another's family trees however. Chaz also recognizes Toby Mace, a coachNPC as his father, but the relation isn't mutual. Marla, on the other hand, has no relation to Toby. It is unknown why they are all related by relationships.
When editing in SimPE, Chaz's zodiac sign is not recognized. When the household is first moved onto a lot, he is 72 hours away from the final exam in his first semester. Like several other Sims from Académie Le Tour, Chaz starts off with no gender preference.