Mr. Sawatari is Izumi's, Mitsuki's, and Karin's father. His given name is unknown.

Upon hearing the rumors of Yoshitaka, he immediately approached the mansion to demand the return of Izumi and Mitsuki. All his attempts at retrieving Izumi and Mitsuki fail, usually when his wife, Mizuho, abruptly stops him.

Like Yoshitaka, Mr. Sawatari is a lolicon pervert, although he wishes to "not be put in the same category." Mr. Sawatari is highly attracted to his three daughters in a perverted way (seemingly stronger when the girls dress up). Izumi has even once said "I've seen how you look at us!" referring to herself and Mitsuki.

(Wikipedia.org)

[Edited by Tiamat]