(slang) recluse: NEET, hikikomori, etc.

(slang) reclusiveness: NEETdom, etc.

guard, guardsman

(literary) member

to select; to choose / to elect / to screen

one's own home

security guard / patrol / defense, guard, guarding, policing, security

security

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend