Mothy began this series as a song producer, and essentially began the trend of Vocaloid song series; naturally he's got a lot of awesome songs to portray the Evillious Chronicles with, and a lot of popularity on Youtube and Nico Nico Douga.
- "The Daughter of Evil" and "The Servant of Evil" really take the cake. They're considered the songs that made the Evillious Chronicles so popular in the first place, from a combination of their music and story.
- "Chrono Story" and its remix (with, most of all, improved tuning) in the Original Sin Story: Complete Edition; some fans have declared it sounds like the perfect opening to an RPG or other such epic story, and it features an impressive guitar solo in the middle.
- "The Master of the Graveyard", particularly the instrumentals in the opening.
- There are several fans who cite "Judgment of Corruption" as what got them into the series.
- The song "Seven Crimes and Punishments" from its titular album; many fans were happy with the showy spectacle of a song and the way the instrumentals differed between the characters, although less happy with how the song, in whole, was only recapping the plot.
- "Drug of Gold" was one of the most popular songs to be introduced on the "Seven Crimes and Punishments" album, both for its tragic (albeit gruesome) love story between Carlos and Banica and mothy's stellar tuning for KAITO.
- The Seven Crimes and Punishments album's remastering of "Miniature Garden Girl" added a whole new set of instruments, improved tuning, and new levels of awesome to a song that was already well-liked; even detractors of the old song state it was a huge improvement, and there's a level of consensus in the fandom that it's the best remastered track in the album.
- The remastered version of "Project 'Ma'", in a similar vein to "Miniature Garden Girl," added far more creative instrumentals and more variation between Eve, Adam, Seth's parts. Eve's part in particular is suitably epic with added violins, while Adam's has a smattering of rock music. Seth's is, in contrast, more low-key with an added filter over his speech to make him sound more sinister.
- "The Song I Heard Somewhere" from the Original Sin Story: Complete Edition album, which uses epic sweeping music to depict Irina's transformation into the series' main villain, and also features callbacks to previous songs like "Re_Birthday" and, especially, "Full Moon Laboratory".
- "Barisol's Child is an Only Child", also from the Original Sin Story: Complete Edition album, which opens up with catchy tango music and ends with Rin and Len triumphantly singing in harmony as Levia and Behemo come together.
- "Tale of Abandonment on a Moonlit Night", the twisted and somewhat creepy, yet still awesomely devised, song of Hansel and Gretel getting abandoned. Like other examples here, it was given a remastering in the Complete Edition album for the Original Sin Story, which added better tuning to Rin and Len, rock instrumentals, and other revisions that most fans agree sounds amazing.
- "Blink". Many fans agree that mothy's tuning of Rin is exceptional from how practiced he is at using her voicebank, and it shows in this short and sweet song about Riliane after her redemption.
- "Master of the Heavenly Yard" is nearly 16 minutes long and serves as a Grand Finale to both the Seven Deadly Sins series and the Four Endings series. With many callbacks to other songs in the Chronicles including "Daughter of Evil", "Servant of Evil" and "Project Ma".
- "Capriccio Farce" is one of the very few songs in the series to feature as many as EIGHT Vocaloids. Using the Cryptonloids plus Gackpoid and Megpoid to make an eight-part chorus, with new characters joining in the mix along the way and the Master of the Hellish Yard's sudden appearance right at the end of the song, it provides a well-needed explanation of the awakened sin vessels, stylized in a Phoenix Wright: Ace Attorney visual novel style. The PV text even includes short character descriptions, and Irregular's "Lu Li La" takes the cake as arguably one of the best "Lu Li La" sequences in the entire Clockwork Lullaby series. Everything in the song will make you forget that the people singing it are inanimate objects who were awakened in a theater.
- "The Last Revolver" is a sad song telling about the events of Nemesis and her lover, but it's a really good sad song. It'll have you at the feels every single time you hear it.
- "The Portrait Glassred Drew" and "The Weather-Beaten Head at Onigashima" are also really good response songs to "The Lunacy of Duke Venomania" and "The Tailor Shop on Enbizaka," respectively. The reveal of Gumina's love for Cherubim and Gakusha learning about the evil deeds of his wife, yet praying for her, are really sad moments in the Evillious Chronicles and are told very well through these songs.
- "Ma Survival" is so catchy that you may almost forget that it's about four ladies killing each other to become the queen of a country and to give birth to twin gods. In the end, winning wasn't really worth it anyway.
- "Master of the Hellish Yard" and "Master of the Court" are two songs detailing the very different lives of each of Gallerian's daughters. They both reference their parents and call out for them in their songs, and overall they feature a really well-tuned Megpoid and Miku.
- "Wordplay," for being the first known Evillious song unless you count "Ten Minute Love" because of the Master of the Heavenly Yard novel. We really didn't know what we were getting into until "Daughter of Evil," but it's something to think about.
- The three final Clockwork Lullaby songs. "Banica Concerto!!" is an epic, fast paced and darkly humorous song about Banica's maiden voyage through the multiverse, filled with callbacks to "Evil Food Eater Conchita" and "Master of the Graveyard", as well as the singing debuts of Lich Arklow and Eater Sabella, who are allegedly played by Meiko tuned to be nigh unrecognizable. "The Karma Of Evil Will Not End" is a suitably creepy song discussing the "Groundhog Day" Loop of the Court Ending, sung by Maria Moonlit with backing vocals from Adam and Eve. Sung in a Creepy Monotone and containing backmasked messages and instrumental callbacks to "Project Ma" and "Prophet Merry Go Round", it has the added appeal that the main instrumental, fittingly enough, sounds the same in reverse as it does going forward. Finally, "Song of the Third Period" is an uplifting song about the souls of the Third Period being led by Michaela as they move on to the next life. It's got a feel-good melody that seems to harken back to the early days of the Vocaloid fandom, as well as featuring characters from nearly every point in time in the series (including, according to mothy, several novel-exclusives) singing along.
- The remixes of "Lu Li La The Resounding Song", "The Letter She Kept Waiting For" and "The Frog And My Love Romance" on the Evils Extra album. "Lu Li La" (noted to be a "parade version") is bombastic and almost sounds like an anime ending theme; "Letter" (retitled "Reach For The Stars - The Letter She Kept Waiting For") is made even more of a Tearjerker than it originally was, with slightly altered lyrics, an opening narration and both Rin and Kaito providing back-up vocals for when the Nun and the Painter are telling their stories; and "Love Romance" (now retitled "The Frog and My Accelerating Romance") is energetic, fast-paced and also underwent changes that turned it into a tearjerker.
- "Creation Girl Gretel", the one new song on Evils Extra, is a beautiful counterpoint to "Ending Boy Hansel", with a softer, gentler sounding melody contrasted with equally macabre lyrics.
