G5104 τοί

an enclitic particle of asseveration by way of contrast; in sooth

(used only with other particles in the comparative, as G2544 (καίτοιγε), G3305 (μέντοι), G5105 (τοιγαροῦν), G5106 (τοίνυν), etc

probably for the dative case of G3588 (ὁ);