Abandon Shipping: In ye old days, there was a following for Whitestorm/Bluestar, due to how supportive he was of her and how he was the only cat she never lost trust in, in her dementia. Then it was revealed he was her nephew and she raised him after her sister died. Cue mass exodus.
Sandstorm is not shown mourning, or even being upset at all at, the death of Redtail, who Word of God claims was her father. The same with the death of Brindleface, who was apparently her mother. Possibly because Flip-Flop of God is frequent when it comes to family trees.
Despite being born and raised a kittypet until he was at least six moons, and regularly sleeping in the crooks of their knees, Fireheart didn't seem to be remotely attached to his twolegs. He didn't even think of them when he ran off to join ThunderClan, besides the fact they'd get a Replacement Goldfish quickly (which they did).
Scourge. The amount of fan works related to him is completely out of proportion to the grand total of 1 out of 20+ main series books he's been featured in. His manga probably contributes to it.
Ashfur of ShadowClan. This one-off elder from Into the Wild is insanely popular among haters of a certain similarly named ThunderClanner relevant in later arcs, because he gives them an excuse to troll Ashfur fans and is genuinely awesome (he's an elder who has had enough of Brokenstar and helps to kick his ass when he kidnaps ThunderClan kits).
Whitestorm and Lionheart for both being Cool Old Guys.
Snowkit, oddly, especially since he wasn't important at all (for those that don't know, he was just a deaf kit in the fifth book who was stolen by a hawk, and did nothing for the plot but edge on Bluestar's madness and force his mother Speckletail to retire as an elder). However, despite that he only has a few scenes, the amount of support and fanfiction (he often survives the hawk attack, through various means) is astonishing.
Redtail, especially considering he's dead from the first book and doesn't make an appearance until the last.
Harsher in Hindsight: Yellowfang being accused of killing Brightflower's kits is even crueler when we read the prequel and find out that Brightflower is Yellowfang's own mother...and both her parents believed she had killed their younger litter.
Heartwarming in Hindsight: Whitestorm's absolute dedication and faith in Bluestar in the first arc becomes more heartwarming when you learn that Whitestorm was Bluestar's nephew and that she had practically raised him since he was a young kit.
He's Just Hiding: Many fans believed that Snowkit did survive being caught by a hawk.
The prologue of Into The Wild has one with Spottedleaf talking about Mousefur being young and strong. It was a perfectly straight comment at the time, but with Mousefur eventually becoming the elderest of elders, it becomes hilarious.
Sandpaw, Firestar's future mate, complains about sleeping with Firepaw in the apprentices' den.
Hype Backlash: There are some fans who don't see why the first arc is so well-liked amongst the fandom, and will agree that while it's good as an introductory arc, it's not anything special. The sizable amount of Early-Installment Weirdness doesn't help matters.
Everyone and their mothers know that Spottedleaf dies in Into the Wild. Given that Into the Wild is the very first book, and she shows up in later books as a Spirit Advisor, it's unavoidable.
Simply using the name Firestar is a big spoiler for the first arc. Admittedly, it's something of a Foregone Conclusion- he isThe Chosen One, and Warriors is not known for its originality- but it means that simply going on forums will spoil it for new fans.
Tigerclaw has done a lot of horrible things, so it's pretty hard to nail down a single moment he crossed the line, but the biggest contender has to be when he murdered the sweet-hearted Brindleface, fed her body to his dogs so they could get a "taste" of cat blood, and then set them on Thunder Clan. Where, by the way, his own mate and children were living.
Brokenstar pretty much danced across the line when he began kidnapping kits and turning them into Child Soldiers, forcing them to fight enemy warriors easily three times their size. The ones who survived the "fights" usually died of their wounds.
Darkstripe feeding deathberries to Sorreltail, his own half-sister, when she was a kit to keep her quiet certainly counts.
Sacred Cow: The first series generally gets this treatment, but especially The Darkest Hour, which the majority of the fanbase cites as the best Warriors book of all time.
Clawface was Graystripe's idol, who betrayed him by being unrepentantly evil. He also killed Spottedleaf, and he was the only character who even made Fireheart go into Unstoppable Rage (twice at that). Also, he was Yellowfang's sister's mate and Nightstar's brother. Despite this, he's killed with little fanfare in Fire and Ice, wasn't mentioned by the heroes since, and didn't even do anything in the Dark Forest based storyline that was in Omen of the Stars. He does eventually get a major role in the graphic novel Exile From ShadowClan, which showcases his relationship with Nightstar and covers more of ShadowClan's side of the Brokenstar conflict.
Brokenstar was essentially using child soldiers to make ShadowClan larger than the other Clans, and managed to drive out another Clan, a feat which has not been replicated by anyone in the series. Despite this, Tigerclaw got much more focus than him in the book where he was supposed to be the Big Bad, and he never ended up feeling like a legitimate threat.
Too Cool to Live: Whitestorm. A Cool Old GuyReasonable Authority Figure who constantly helped Firestar, was the one cat Bluestar never doubted during her paranoia phase, and had more than his fair share of awesome moments? Sadly he's killed in The Darkest Hour, but fans still remember him fondly.
The Un Twist: Despite the Fireheart's suspicions and mistrust, Tigerclaw is Bluestar's trusted second-in-command. Surely she has for reason for that, right? Perhaps the leader knows something the child protagonist does not? Nope. Fireheart is right about Tigerclaw and Bluestar is wrong.
Vanilla Protagonist: A certain amount of fans think the Clan drama is more compelling then Fireheart himself. Though, Fireheart isn't hated per se—at worst he's (almost) merely overlooked by fans in favor of other characters such as Bluestar, Yellowfang, Cinderpelt, Graystripe, and other cats.
