Someone ( typically someone with a more stern outlook on life )'s sweeter side, this may be referring to just a nicer side of the person, or having a [crush[ on someone,
"Have you seenPerson A's sweet side? I noticed them showing that side of them a few days ago!"
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.