Hashalush (hash-shee-LOOSH) HaKodosh (haw-ko-DOHSH), the form indeed allows for the plurality within the Godhead.  YHVH, YAH SHUA, and the RUACH HAKODESH all three of them are holy (kadosh).  Their realm of holiness entirely sets them apart from our common earthly sinful realm, the habitual darkness we live in, or the profane unclean acts on the earth.