Ka cika wannan magana: Ba a san rayuwar Constantine ba har sai 1259, sa'ad da ɗan'uwansa na biyu, Michael na takwas ya naɗa shi "Caesar". A shekara mai zuwa, an kuma sanya shi "sebastokrator". Ya umurci sojojin Byzantine a kan yakin da ba a yi nasara ba a kan Latin Principality of Achaea, inda sojojinsa suka yi nasara a yakin Prinitza. Koyaya, Constantine ya riga ya bar yankin a lokacin babbar nasarar Byzantine a
Yaƙin Makryplagi a cikin 1263/1264.