They help each other cope with anything that they face/go through.Sweet Bun is still very sweet especially towards her girlfriend.Sayori- Pan (she’s just a cinnamon bun who loves love)
They became codependent (as best friends do) and romance sparked from there. It was kinda awkward at first but soon they got closer, Monika helped sayori cope with depression and sayori helped Monika deal with her slight anxiety. Sayori was very forgiving and understood Monika’s reasoning but didn’t think Monika owed her anything however she soon got used to having Monika hanging round her with Monika being really nice (she was super anxious that sayori wouldn’t forgive her) and sayori really appreciated that and they became best friends. Dynamics: After the events of DDLC Monika apologised to all of them however she felt the most indebted to Sayori especially now with the lack of MC.