Person 29

Person 29 has Person 0 as his only friend in his entire life, he watched Person 0's death and decided to avenge him

Person 29: SOMEONE KILLED PERSON 0???
Person 29: I WILL DEDICATE MY WHOLE LIFE TO AVENGING HIM!!!
Later that week the police found Person 28 dead on the floor, Person 29 isolated himself in the woods trying to not get caught by the police

Person 29

Said to only show up on leap day.

Yeah that's it really

Person 15: Where's Person 29? I need to talk to him
Person 13: You just missed your chance. You have to wait 46 more months :P
Person 15: NOOOOOOO-