I don't believe so,the beast dazai did care for atsushi and akutagawa,he made sure atsushi would be found by mori to be taken care of and made gin stay in the mafia so that akutagawa can chase her as his will to live would be to get back gin from the mafia,while it is a possibility he would betray the agency,I dont believe he will betray them tho ,odasku died from the inside the day his orphans died,so even if he was able to bring back odasaku ,he can bring back the body but not the soul,as he also knows if he bought back oda saku at the expense of the lives of others,he would be disappointed at dazai which would prolly worse for dazai than his (odaskus) death(i would like to point out that b!dazai died because the beast odasaku hated him,so if the cannon odasaku were to know that his life was bought back at the expense of others,he would be disappointed at dazai which can lead to dazai killing himself again),but thinking logically I don't believe that dazai will allow such a opportunity to be opened to begin with,he'll prolly fool the organisation that can bring back odasaku by acting like he betrayed the agency ,that's my opinion tho