1 Characters never stop talking about the mesmerizingly deep and original concepts of "hope" and "despair"
Replaced by "truth" and "lies" in V3, but still - xandermartin98
2 Lead protagonists are the only relatively normal characters
3 Big muscular Gentle Giant characters in nearly every single installment (Sakura, Nekomaru, Great Gozu, Gonta)
4 Junko always turns out to be the main villain in at least some stupidly contrived way
5 Annoying, creepy pervert characters in every single installment (Hifumi, Teruteru, Kazuichi, Toko, Korekiyo)
And how did you forgot the bucket of swears, Miu Iruma - SoaPuffball
If they're a fracking pig, you can say so (wink, wink) - xandermartin98
6 At least one character from each installment has the ability to turn Super Saiyan (Ishimaru, Sakura, Hajime, Nekomaru, Toko, Gonta)
7 The classic "Protagonist Ahoge" hairdo, complete with goofy antenna sticking out the top (Makoto, Hajime, Komaru, Shuichi)
Actually, Kiibo and Nagito also have major exaggerations of this - xandermartin98
See the T.V. Tropes Idiot Hair and Hair Antennae.
8 Characters that are deliberately made to look ridiculously out-of-place with the art style (Monokuma, Monomi, Teruteru, Daisaku, Ryoma)
9 Characters that are blatant ripoffs of ones from other works (Junko of Harley Quinn, Monokuma of Freddy Fazbear, Gonta of Tarzan, Izuru of Sephiroth, Kiibo of Astro Boy)
Also, Jataro of Leatherface - xandermartin98
Monokuma is... Freddy Fazbear...
Trigger Happy Havoc- 2010
Five Nights At Freddy's- 2014... sure
This is a really bad section.
10 Ridiculous anime hairstyles (Hagakure, Mondo, Nagito, Celestia, Kaito, Nagisa, Hifumi)
ESPECIALLY Hagakure and Mondo - xandermartin98
11 The Gentle Giant characters always die, every single time
And people are always sad about it!
come on, you gotta come to expect these things...
12 The trial courts are always entered through increasingly extravagant elevators (in the main series of games)
Also in Ultra Despair Girls, actually - xandermartin98
13 Lovable Cowards (Ryoko, Hagakure, Toko, Kazuichi, Mikan, Ryota, Ryoma, Miu, Tenko)
14 Spoiled Brats (Ryoko, Junko, Hifumi, Hagakure, Togami, Saionji, Mikan, Ibuki, Sonia, Monaka, Tenko)
Sorry, forgot to mention Miu - xandermartin98
15 Weird stalker relationships between characters in every installment (Toko with Togami, Nagito with Hajime, Kazuichi with Sonia, Monaca with Nagisa, Tenko with Himiko)
16 Every installment always has a bittersweet twist ending where everyone escapes
17 The infamous "character actually committed suicide" plot twist
18 Monokuma always has to appear in everything simply because he's the mascot
19 Characters disguising themselves
20 Culprit always goes completely nuts whenever he/she gets found out in class trials
21 High-school setting, complete with the infamous "Ordinary High School Student" trope
22 Always divided into either five or six chapters, just like the Phoenix Wright games
23 Chibi Characters (Monokuma, Monomi, Saionji, Fuyuhiko, Kokichi, Makoto, Kiibo)
24 Overreliance on sex jokes
25 Extremely Unapologetic Anti-Heroes (Matsuda, Togami, Toko, Nagito, Nagisa, Haiji, Miu, Angie, Kokichi, Korekiyo)
26 Sephiroth Hair (Sakura, Kyoko, Izuru, Nagito, Haiji, Korekiyo)