'''Basic Trope''': Close friends or allies become bitter enemies.
* '''Straight''': [[TheHero Hiro]] and [[TheLancer Ichigo]] were the closest of friends, but events later, they despise each other.
* '''Exaggerated''':
** Hiro and Ichigo were best friends to the point that they put each other over anything in the world. Nowadays they're {{arch enem|y}}ies who only want to kill each other.
** EvilFormerFriend
* '''Downplayed''':
** Hiro and Ichigo weren't exceptionally close, but were still respectful to each other, but now they are on opposite sides.
** Although Hiro and Ichigo [[VitriolicBestBuds dislike each other, they are still friends nonetheless]]. After that, the dislike has turned into burning hatred.
** Hiro and Ichigo used to be best friends during high school. Come university and career time, and the two drifted apart, and while they don't particularly hate each other, now they don't really care for each other, preferring to move on with their lives.
* '''Justified''':
** Either Hiro or Ichigo had a FaceHeelTurn and joined Emperor Evulz.
** Hiro and Ichigo were {{Friendly Rival|ry}}s who have high competitive spirits which had gotten them carried away.
** Either Hiro or Ichigo had [[MyGreatestFailure done something that could let the one of them down and that one of them will live with the shame of making the bad decision.]]
** (For Downplayed #3)[[TruthInTelevision ...This was because they moved to different cities, have different friends, and simply didn't have time for reunions.]]
* '''Inverted''': Hiro and Ichigo were enemies to each other, but [[FireForgedFriends later become friends]].
* '''Subverted''':
** Hiro and Ichigo don't know each other.
** Hiro and Ichigo begin to miss each other and want to make up.
* '''Double Subverted''':
** But it turns out they were just pretending to not know each other because their old friendship soured so badly.
** But after one of them reminded each other of that particular mistake, they go back hating each other.
* '''Parodied''': The self-destruction of Hiro and Ichigo's friendship was due to fighting over the last piece of cake.
* '''Zig Zagged''': They change sides (and stories) often, going from friends to enemies again in an eye blink.
* '''Averted''': Hiro and Ichigo remain as friends.
* '''Enforced''':
** "We need a new villain for Hiro. I know, let's have Ichigo to oppose him."
** The author wants to make a point that not all good friendships last forever.
* '''Lampshaded''': "There goes Ichigo. He was my friend. 'Was' is the key word."
* '''Invoked''': Emperor Evulz, who is sick of Hiro and Ichigo's unbreakable friendship begins telling nasty lies about what they've thought each other.
* '''Exploited''': ...only to have Ichigo to become his [[TheDragon newest member]] and future successor of the dark alliance.
* '''Defied''': Despite every obstacle that is placed between them, they choose to remain as friends.
* '''Discussed''': "It's a shame to see great friends like Hiro and Ichigo to become completely separated from the other."
* '''Conversed''': "Hiro and Ichigo are enemies! What am I complaining about? I'm sure they'll be friends again by the end of the season."
* '''Deconstructed''':
** Hiro and Ichigo's new-found enmity has caused the world to become more {{crap|sack World}}pier than ever before. In other words, Emperor Evulz has used their hatred for one another to enslave it.
** The end of a friendship marked the beginning of both Hiro and Ichigo's [[FallenHero downfall]] [[HeWhoFightsMonsters as upstanding]] [[EvilVersusEvil and compassionate human beings]].
** Being class leaders in high school, their lack of enthusiasm in coming to reunions - preferring to move on with their current friends - [[TearJerker ultimately made a lot of their classmates drift apart, to the dismay of 3-4 (out of 25) alumni who did attend their reunion, including their former teacher.]]
* '''Reconstructed''':
** The friends manage to bring back Hiro and Ichigo together again to defeat Emperor Evulz and save the world, but while their differences are still irreconcilable, they don't hate each other like they used to.
** Their conflict makes it easier to track Hiro and Ichigo down to detain them and prevent them from committing any truly heinous acts.
** The alumni who attended remain close, while those who didn't have made closer friends through their hobbies and/or are already busy networking for their chosen careers.
Hey, Troper. It's me, an old friend of yours. Or used to be. WeUsedToBeFriends until you [[TvTropesWillRuinYourLife allowed this website to take over your life and damage our friendship]].
%% Optional items, added after Conversed, at your discretion:
%%* '''Implied''': ???
%%* '''Plotted A Good Waste''': ???
%%* '''Played For Laughs''': ???
%%* '''Played For Drama''': ???