These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Either Ky's a one of a kind heroic character who gets significant character development as his idealism battles with reality, or a generic, self-righteous, blonde knight. Variations are plentiful whether you know his character well or not, which includes his workaholic cop life or his love for teacups.
Either Dizzy is a three-year-old trapped in a mature porn star's body or a symbolic character. She's a Half-Human Hybrid, has both demonic and angelic elements, either peaceful or destructive. Either way she's very, very vulnerable.
Jam is either a cute, strong and ambitious Genki Girl or a simple-minded bitch because of her flirting with Ky and a Shotacon for recruiting Bridget.
Thanks to Slayer's story in Accent Core + and his advice to Venom on not getting too attached to Millia, more than a few fans have latched onto the idea that Venom is bisexual or only gay for Zato, interpreting his attachment as harboring a love-hate complex for Millia instead of vengeance/jealousy taken to the point of obsession.
In the original games, Sol had a powerful combo that has been given the Fan Nickname of "the Dust Loop." It involved comboing certain moves together in such a way that the opponent would be locked in the corner. This is promptly followed by, as the name implies, a seemingly infinite loop with his Air Dust, resulting in a ridiculous number of hits, ending in a Volcanic Viper combo when they started to slip out of the loop. For Massive Damage. This was eventually toned down in later games and removed completely in Accent Core, though unfortunately, it came back in Accent Core Plus, but only for Order-Sol's EX mode, which is based off of his GG1 incarnation but with added Reload stats.
Guess what? The Dust Loop is back in full force in Xrd—as a matter of fact, it was shown off in the first trailer.
Eddie. The top tier in the first edition of GGXX was called "Eddie tier" for a reason.
Justice. As she is only in the console versions and is horribly unbalanced, she is banned from ALL tournaments along with Kliff and sometimes Robo-Ky.
In an effort to avert this, Justice (along with Kliff) will be properly balanced for the first time in the series in the Accent Core Plus R update.
Zappa's Confusion Fu. Getting Raoh out is tough to do, but Zappa with Raoh is arguably the strongest character in the game, boasting superior strength, speed, and reach, and possessing a very powerful Overdrive.
In the first Guilty Gear, pick Millia, let her health drop below 50%, and spam her super nonstop. The opponent has very little chance of getting close to you.
Harsher in Hindsight: Several characters' backstories indicate that Japan was destroyed in Guilty Gear's timeline. Given the 2011 earthquake/tsunami/possible threat of nuclear meltdown and mass radiation poisoning events that recently hit Japan...
Justified by a number of flaws. Despite his Marty Stu characteristics, what Sol did was to spearhead the Gear Project and spent a hundred years trying to correct it, efforts in vain. Compared to Ky who has contributed greatly to mankind's victory in his teens, Sol seems utterly inferior. Sol was also not able to get revenge on That Man, and was defeated after he meets him. To boot, he's an Unwitting Pawn in That Man's plans.
"Everyone is gay for Bridget" is a popular Image Macro phrase used for trolling. It really confuses people who aren't familiar with the series. (Before it was renamed, the trope Unsettling Gender-Reveal was known as Dropped a Bridget on Her.)
GAHN FURAYME! is at least semi-memetic, Mondegreens aside. Although Ishiwatari isn't a regular at anime conventions, you can already guess the single line fans ask him to do when he does attend one.
HEAVEN OR HELL! DUEL 1! LET'S ROCK! The GGXX announcer's rendition is the most iconic, to the point that there has been backlash against the new voicework starting in Accent Core for not living up to the precedent set.
Needs More Love: Fanny. The fact that she appears in all of two games (Petit and Petit 2, both spin-offs) despite having a tangible connection to Dr. Baldhead/Faust that could've been easily fleshed out in-canon only makes it worse.
The matches in The Missing Link can be less than ten seconds small, thanks to the local finishing move system: you can perform these on any round and, if everything goes horribly fine, end the game on the first round. Some practice is required to master the finishers on your own, although the CPU opponents (especially Justice) don't seem to have much problems pulling those off. No wonder it was nerfed by the time the sequel came out.
Isuka is one of the very, very few fighting games to include the "Turn" button in place of autoturning. Well, its existence could be proven by the fact that a lot of special moves need you to wiggle the directional pad a lot just to perform those on a certain opponent... but in practice, not only it turned out to be highly inconvenient during the ridiculously fast-paced matches of the arcade mode (where the CPU opponents, again, barely have any problem with turning themselves in the right direction), it also becomes a completely tedious Damn You, Muscle Memory fuel whenever you have a mere one-on-one match. Many fans felt that this feature crippled an otherwise decent spin-off title.
Ship Sinking: Hoo boy, did Overture ever trip over this land mine. Dizzy had a very wide number of people she was close to in the series, but it was ultimately decided in Overture that she'd be paired up with Ky Kiske while the rest don't appear at all. Suffice it to say anyone who wasn't a Ky/Dizzy fan didn't takeit well. Heck, even the Ky/Dizzy shippers themselves were angry because of Dizzy's current fate in Overture.
So Bad, It's Good: The Guilty Gear XX N.Y/L.A vocals. The lyrics are out of character, barring the lyrics to "Awe of She," which is about getting away from the fighting. "Awe of She" is, of course, the theme of Dizzy.
People are already complaining that Xrd is 2½D and running on the Unreal Engine, being an engine normally used for Western games, especially FPSs.
Potemkin's new look in Xrd has pretty much divided fans between those who don't mind it and those who invoke this trope.
Tier-Induced Scrappy: Millia. In the first Guilty Gear. Next to the Final Boss Justice, she was by far the cheapest character in the game, capable of throwing direction-changing projectiles and keeping you at hair's length. And her super involved firing a myriad of slow-moving, large, homing projectiles that guaranteed you could never get anywhere close to her. And if her health dropped below 50%, she could spam that move forever. It was very difficult to get close to her, and there she was even more dangerous. Thankfully, she's never come close to that level of cheese since then, as she no longer has the old super and her projectiles work much differently now.
Justice in the first game was worse. You know Imperial Ray, that super she has that fires a laser in a circular path across the screen? In the first game, she has it as a normal attack. What's more, Gamma Ray doesn't have nearly as much windup time in that game, allowing her to easily hit you with it several times in a match. And, of course, if none of that gets you, she's also got the Destroy attack feature to abuse.
Viewer Gender Confusion: Justice. Due to the odd... protrusion from the crotch of her armor, many are surprised to find out she's female (and Dizzy's mother, no less!).
Villain Sue: That Man. Not only is he stronger than pretty much all of the cast (only Slayer really contests this claim, but the most interaction they've had is a brief chat in XX, not an actual battle), including Sol in his full Dragon Install form, but everything has been going just as planned for him thus far, and he can access the Backyard with little to no difficulty. And unlike Terumi, That Man has yet to suffer ANY type of defeat.
Oddly enough, despite That Man being the main catalyst for everything that went wrong in the series (alongside Sol and Aria) and Sol hating him with a passion, That Man is actually very much The Atoner (just like Sol and for the same reasons) and is apparently working from the shadows to prevent another apocalyptic calamity (and according to his words, Sol is also necessary for the world's continued survival). This is best seen in Overture where he oversees Valentine's actions, tips off the heroes to (part of) what's really going on, and even saves Sol at the end when he's trapped in the Backyard). In short, if Sol is The Messiah, That Man is his thematic opposite. On top of this, That Man has to often reel in I-No (who's far closer in demeanor and deeds to Hazama, her SpearSpiritual Successor) and apologize for whatever trouble she's caused. Whether this lessens the alleged Sue label or drives it home even further is up to you to decide.
Dizzy in GGX. She was driven away from her village when she began to grow wings and a tail, separated from her beloved foster parents and was forced to live in a cave. Though, as humans were abusing her. She does her best to defend herself without hurting anyone seriously. She ran to the grove and lived there alone. She wanted friends. In the drama CDs, she was able to make friends with a blind girl named Josephine; however, when her eyes got healed she was horrified to see Dizzy and called her a monster. Things went From Bad to Worse again when the UN issued a very huge bounty on her causing almost every member of the Guilty Gear X cast to hunt her down. What's her reaction?
Stay away! I don't want to hurt anyone!
Testament. In the drama CDs, we learned that he was once a very king young man who just wanted to make his father proud. Sadly, his desperation pushed him to undergo Gear conversion and that resulted into his lost of humanity. He hated and killed a lot of humans and even contributed to his father's demise. This is even sadder when you learn that Testament actually loved children and has a taken in orphans in the past. He continues on atoning for his mistakes.
Jerkass Woobie: While Zato was an assassin and a really vain and selfish one at that, the drama cds did show he actually cared for his underlings and especially Millia (even if he eventually got a bit strange with that), making the knowledge that he's eventually consumed, driven insane, and killed by his shadow a bit hard to take. Even Eddie, the shadow in question who goes out of his way to taunt the people who cared about Zato and spend every game attacking the rest of the cast, constantly shows that he's desperate for a host because he's afraid of death and taunts those people in order to be remembered.
Wheelchair Woobie: Marina from Lightning the Argent, the novel set shortly before the events of GGX. A cripple who was taken in by a priest as an infant, it's later revealed that she was separated from her sister Solaria, who was instead experimented on by the Blackard Company and transformed into a Command-Type Gear—a fate that Marina would've shared had she not ended up being whisked away to safety. Later on, she accidentally drinks Vitae, an alleged miracle drug that ends up curing her disability and allowing Marina to walk. The catch? Vitae is manufactured using Gear cells. Gear cells that react violently to Solaria's songs, causing Marina's legs to explode into sentient, singing, snake-like tentacles with a woman's face that try to devour her. Ky has to hack off her legs in order to prevent Marina's mutated body parts from eating her (something that many other villagers were not fortunate enough to avoid), and it takes a timely invention from Faust to fully treat and save her life, though Marina ends up back in the wheelchair. Things do look up for her at the close of the story, as she is reunited with Solaria and the two are placed under the watchful eye of Ky and the rest of the IPF, but damn.