Dr. Ken Sanada is Mitsuki's dad in the "real" world. In the parallel world, he is the Commander-in-Chief in charge of
fighting the RaRa Army. In the parallel world, he was never married and apparently isn't Mitsuki's father. Dr. Sanada is the
mastermind behind the whole "parallel world transporting thing". He sent Mitsuki and Kazuki to the parallel world, but of
course, Kazuki was sent there by accident. Both Commander and Dr. Sanada share many of the same attributes. They're both
way too silly to be a 40 year old man. Neither of them take stuff seriously, but that doesn't mean they can't be depended
on. In Kazuki and Mitsuki's perfect world, he is the father of Mituski Sanada, adoptive father of D, and uncle to Kazuki.