the way kouyou feels about dazai can be inferred from the way she treats chuuya with such easy familiarity vs dazai with her regular coolness. being so closely intertwined with the mafia, and the fact that her own escape was thwarted, we can also assume she dislikes dazai because he left practically unscathed (he did not leave unscathed, but i don't know if she knows about odasaku). so the whole 'she DESPISES HIMMM' thing is very much fanon, but not entirely baseless yk?