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.
Alternative Character Interpretation: Noisemaster, did he recognize The Nightmare Knight's energy was what stopped his plan? Rosemaster's conversation with the Nightmare Knight indicated a growing resentment Noisemaster had with his leader as he felt the Knight was unreliable. Were his final words "So... It's like that" him conceding to another failure, or just disgust at the Knight's sabotage and an epiphany about how they will never truly win?
Base Breaker: Fans are divided on Almond; she receives the lion's share of the focus over the ostensible protagonist Cucumber, while being hypercompetent and even her mistakes turn out for the best. Some find her a boring character because of this, while others argue that part of the story is subverting conventional hero roles and she's fulfilling Cucumber's role as the legendary hero.
There also seems to have been another divide due to Almond getting Cucumber, herself, and Carrot almost killed by Nightmare Knight.
For her part, Gigi considers Almond and Cucumber both the main protagonists, but some still point out that Cucumber still hasn't had much opportunity to step outside of other people's shadows.
Cry for the Devil: When Almond yells at Cucumber for trying to talk to the Nightmare Knight, she says it's "all a trick". This makes the Nightmare Knight flashback to a previous legendary hero who said the same thing, and is supposed to make us feel bad for the Nightmare Knight.
Mr. R managed to capture the hearts and minds of the people before he even uttered a line of dialogue and his popularity seems to only be set to increase with time.
Not to mention his assistant Azalea, who without having a single line of spoken dialogue yet is one of the most popular characters in Chapter 3 because of her design.
Foe Yay: Peridot's obsession with beating Almond, especially when combined with her Tsundere attitude and Almond's playful teasing.
Almond: You just can't stay away, huh? Peridot: Shuh- SHUT UP!!
Fourth Wall Myopia: In light of the Princess R competition, Almond has received a lot of hate in certain circles for being antagonistic towards the Nightmare Knight. However, the only one to have seen his softer side thus far is Princess Parfait; additionally, nobody in Cucumber's party knows that the Nightmare Knight who nearly sent them into the sun was most likely a fake. And Almond does have good reason to be legitimately concerned that Cucumber is in danger, since the Disaster Masters want to get rid of the Legendary Hero and the Nightmare Knight is much stronger than he is.
Genius Bonus: Princess Piano is named not just for the instrument but also for the musical term which indicates playing softly—it is, of course, an Ironic Name.
Played with. There are several points in the story so far where a more logical and reasonable choice could have saved everyone a lot of trouble, but they never do it because it's simply not how these things work. It usually runs on Rule of Funny.
The entire plot kick starts because the people in charge of hiding the Plot Coupons are really, really bad at it.
Perfectly summed up here:
The Oracle: I don't have time to spend interrogating every "Legendary Hero" who walks in here! Cucumber: But—But that's just stupid!
Jerkass Woobie: Even though Splashmaster is... well, Splashmaster, it's easy to feel bad for him when he's challenged to a game he doesn't understand and is physically incapable of participating in.
Noisemaster and Mutemaster. Noisemaster was legitimately evil as he tried to kill Nautilus and the entire Melody Kingdom, but his depression after he failed makes it hard not to feel sorry for him.
LGBT Fanbase: Particularly since several of the most popular characters (Peridot, Rosemaster) are gay, transgender, etc.
Glitchmaster is pretty scary, considering her form resembles a pixelly black void.
Sacred Cow: A funny example when it came to shipping Almond and Peridot, most were not vocal and those that were, were quick to call it weird. It wasn't until Gigi herself said it was okay, that people began to loudly squee over the ship. It can mostly be accounted to the age of the two.
Viewer Gender Confusion: Cosmo. Possibly. Assumed to be male, but there really isn't an indication of Cosmo's true gender. No one in the comic has actually used the word "he" or "she" yet. For her part, Gigi is intentionally keeping Cosmo's gender vague.