- Crowning Moment of Heartwarming:
Rin: There is no need for words anymore/That is what I thought/I knew it this is happiness/ You told me that you love me
- The simplest example would be the end of To the Reticent You
With that, she was happy
- The final line in White Brick and Black Mourning Dress where the girl finally gets to be with the boy she saw in the mirror—by giving birth to him and raising him as her son.
- Ear Worm: Mothy has a tendency to produce this in his songs. The "Lu, Li, La" part of the Clockwork Lullaby series is pretty much guaranteed to get stuck in your head.
- Evil Is Cool / True Art Is Angsty: Mothy has written some songs that are actually pretty adorable (Ten-Minute Love, To The Reticent You, South North Story and TwiRight Prank) but he's most well known for writing tragic, and Nightmare Fuel filled stuff about horrible people, people dying, or horrible people dying.
- Les Yay: Occurs in the songs where there are two Rins. In South North Story Rin and Riliane get very intimate with each other and in Screws, Gears and Pride one of the Rins practically gives the other the Tsundere, "It's not that I like you or anything" speech when helping her escape.
- Tastes Like Diabetes: It's rare, but when Mothy decides to write cute songs, they are really, really cute!
- Tear Jerker: Produces quite a few of these, such as Flames of Yellow Phosphorus, White Brick and Black Mourning Dress, and Watching Us.
- Tough Act to Follow: The Evillious Chronicles. It's his most successful, longest running, and most well-known out of all of his works and series. Things he does outside of it (such as "The Torture Tower Doesn't Sleep" series and Unlock City, though it may come to be averted for the latter) are usually given a passing glance by its fandom to see if it's Evillious related and then dropped when they find out it's not (English fans do this in particular, in part due to the difficulties of obtaining material in the first place). It's to the point where all his songs of dubious canon are analyzed endlessly to find a link to the Chronicles because that's what most people think of when they see his producer name.
- The Woobie: The unnamed girl in Flames of Yellow Phosphorous. Abused by her father, tossed out into the street and then ultimately burned to death.
- The boy, girl and stars in "Watching Us". The boy falls ill, possibly terminally, and can't get treatment because he's poor. His sister, in order to pay his medical bills, has to work for hours in a factory. The stars can only watch helplessly as they suffer, pointing out that they are incapable of granting miracles no matter how much people pray.
YMMV / mothy
YMMV tropes for the Evillious Chronicles go here.