Rules Commentary :
Returning Models to a Unit: Some rules resurrect or return models to
their unit. Such models are added to their unit (see Adding Models to
a Unit) along with any wargear and Enhancements they started the
battle with. Such rules can never expand a unit beyond its Starting
Strength; any additional models that would be returned beyond that
point are ignored (the only exception to this is the Split ability of
Pink Horrors and Blue Horrors). If such a rule returns models to a unit
in the same phase they were destroyed, then for the purposes of
allocating attacks later in the same phase, such models do not count
as having lost any wounds or as already having had any attacks
allocated to them this phase. If a Leader model is destroyed and
subsequently returned to the battlefield, and the Bodyguard unit
they were attached to is on the battlefield, they must be returned
to that unit to form an Attached unit once more (otherwise, they are
returned as a separate unit).
