even if they roam around with two [different] forms —

 both —

 ḥe and il̤aiya perumāl̤ who does not separate from ḥim, came —

the twin aṣvinī dhĕvas —

creation and sustenance of brahmā, rudhra —

two Rakshasās, Madhu and Kaitapa —

(subsequently) as two —

the two wrestlers —

the two demons madhu and kaitabha —

the two pirāttis, srīdhĕvi and bḥūdhĕvi (thirumadanthai, maṇmadanthai) with unparalleled divine face like the moon, —