Bio & Prologue/Chapter 1 of Mother 3

Y/N L/N, the adopted older brother of Claus and Lucas, Y/N is a strong PSI user but what he really shines in are his weapon skills, he's able to change weapons on a whim and each one is unique from the other, however, he only has 4, 1 is able to change form it technically counts as two, how will Y/N react to Hinawa not coming home?