Simis Bachelor is the deceased father of Bella Goth and Michael Bachelor. Not much is known about him, as he is only featured in the family trees of his descendants. He wasn't playable in The Sims.
Life leading up to The Sims 2
In The Sims 2, Simis Bachelor is deceased, leaving his daughter Bella Goth as his only living descendant. His son, Michael Bachelor, and his wife, Jocasta Bachelor, are also deceased. His grave whereabouts are unknown.
Life leading up to The Sims 3
In the Sims 3, Simis Bachelor works as a journalist, living together with his wife Jocasta Bachelor, and 2 children, (Bella Goth, and Michael Bachelor). Bella is a child and Jocasta is pregnant with Michael.