one member of a group

Clipping of 特別攻撃隊 (“a specially-organized attack force”).

a grandfather

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

he; boyfriend

great-grandfather

great-grandfather, especially one's grandfather's father

great-grandfather

great-grandfather