anyone got IMG of big head/body HDJ and LGJ ?

is that a green shield which i often see in some vids at nico ?
and how it works (active/not active) ? it's hp ?

thx for someone who can help me

That's force barrier LGJ.
And I think it has unlimited hp for a short amount of time like EVE's sheild.

Just FYI, big head/body do exactly as the name says, make those parts massive.