- Death Mannetjes Desu Manetchzu>: Mannetje is a Dutch word that refers to a small man.¹

- Death Ra < Desu R>: The R part of the name is from the katakana character ra.

- Death Ri < Desu R>: The R part of the name is from the katakana character ri.

- Death Ru < Desu R>: The R part of the name is from the katakana character ru.

- Death Debu Re < Desu Debu R>: The R part of the name is from the katakana character re.  The Debu part may mean fat.²

- Death Nightmare < Desu Naitomea>: Obvious.

- MC Fly <MC MC Furi>: Obvious.

- Sailor Pewter Fox < Sr Pyt Fokkusu>: Obvious.

- Sailor Titan[ium] Kerokko < Sr Chitan Kerokko>: The term kerokko is a cute Japanese name for a frog.  The Japanese write chitan to approximate the German word Titan, which refers to Titanium.³

- Buttress < Batoresu>: Obvious.

- Shadow Mantis < Shadou Mantisu>: Obvious.

- Shadow Bug < Shadou Bagu>: Obvious.

- Sailor Theta < Sr Shta>: Theta () is the eighth letter of the Greek alphabet.⁴

- Sailor Phi < Sr Fai>: Phi () is the twenty-first letter of the Greek alphabet.⁵

- Sailor Chi < Sr Kai>: Chi () is the twenty-second letter of the Greek alphabet.⁶

- Sailor Mitis Kerokko < Sr Mto Kerokko>: Mitis is short for mitis metal.⁷

- Kern < Kerun>: Kerun is likely a short version of Kerun-seki, which is a Japanese name of the mineral Kernite.⁸  The Kerun part of Kerun-seki approximates Kern, so this character may have the name Kern.

- Serpen < Spen>: Serpen is short for serpent.

- Kraken < Krken>: A kraken is a kind of monster.⁹

- Loof Merrow < Rfu Merou>: A loof is the part of a ship's side where the planking begins to curve toward bow and stern.  A merrow is sea creature like a mermaid.  This Sera Myu show pertains to an island (Kaguya Island), and there is at least a ship in the show, so the terms loof and merrow fit the nautical-island theme.  Several sources write the name as “Roof Mellow,” but roofs are not as relevant as loof and merrow are.  Mellow does not seem to be relevant, either.  Nevertheless, some fans still use the less-relevant “Roof Mellow.”

- Dark Plasman < Dku Purazuman>: Plasman is from plasma.

- Leah Ruby < Rea Rub>: In the Bible, Leah is the first wife of Jacob.¹⁰

- Bilhah Emerald < Biruha Emerarudo>: In the Bible, Bilhah is Rachel’s handmaid, whom she gave to Jacob.¹¹

- Zilpah Sapphire < Jirupa Safaia>: In the Bible, Zilpah is Leah’s handmaid, and the mother of Gad and Asher.¹²

- Dark Menorah < Dku Menor>: A menorah is a nine-branched candelabrum used in celebration of Hanukkah.¹³

- Kukku < Kukku>: Obvious.  The name may indicate the word cook.

- Mikku < Mikku>: Obvious.  The name may indicate the name Mick.

- Fukku < Fukku>: Obvious.  The name may indicate the word hook.

- Empire Artuqa < Teikoku Arutuka>: It is likely that Teikoku Arutuka is an alteration of Arutuku-ch, the Artuqid Dynasty.  There was also a Artuqid Kingdom.  In that case, Teikoku Arutuka may be Artuqa Empire or Empire Artuqa  Some Japanese sources write the name of the Sera Myu empire as Arutika.

- Death Pa < Desu P>: The P part of the name is from the katakana character pa.

- Death Pi < Desu P>: The P part of the name is from the katakana character pi.

- Death Pu < Desu P>: The P part of the name is from the katakana character pu.

- Death Pe < Desu P>: The P part of the name is from the katakana character pe.

- Count Dracul < Dorakuru-hakushaku>: Dracul is a Romanian name that used to mean dragon.  The name Dracula means son of Dracul.¹⁴

- Undead Berserk < Andeddo Beruseruku>: Obvious.

- Le Fay < Ru Fei>: In Arthurian legend, Morgan le Fay was the sorceress sister and enemy of King Arthur.¹⁵ Many fans often write Le Fay's name as “Lu Fei” for good reason (other than the fact that the katakana-character combinations can approximate it).  The Japanese do use Ru Fei Ru Fei to approximate the le Fay part of the name Morgan le Fay.

- Death Lamia < Desu Rami>: A lamia is a female vampire.¹⁶