Sakie has to wake up early because she lives out in the boonies to avoid all the problems she can cause as a succubus.
Sakie has real adult problems, like feeling guilty over perceived slights and drinking beer to drown her sorrows. At least she looks good taking a shower.
Hikari continues to be the funny heart of the show. She's also raced far ahead of the other girls in Takahashi's harem. They probably don't even know they're in a harem...
Confirmed: Sakie and Kyouko love Takahashi's strong arms. Sakie also wants to have sweet moments with a man, but her succubus nature complicates things.