Ragnarok (Skeptikitten) (Fanfic)

Ragnarok provides examples of:

And Your Little Dog, Too!: when L takes Light into protective custody, Loki instead begins targeting Light's friends and family.

Bodyguarding a Badass: After Loki challenges L and names Light Yagami as his future victim, L responds by forcibly taking Light into protective custody — a task that was easier planned then done since Light has a blackbelt in judo and doesn't feel he needs L's "protection", nor does he wish to put others at risk guarding him when he can take care of himself.
Boxed Crook: In this universe, "Kira" is a hacker that works for the NPA to avoid prison time.

Celibate Hero: Light hasn't been in a relationship with anyone for over a year, nor feels the need to have one.
Chaste Hero: L does not get sexual relationships. At all. Once when he was 16 and curious about why people make a big deal about sex, he had Watari procure for him the services of a couple of prostitutes. He never tried again.

Fish out of Water: L sends Mello and Matt to spy on Light. Since they are in the middle of Tokyo, Light notices the blonde kid spying on him almost immediately.
For Want Of A Nail: It's Death Note, but the titular death note doesn't actually exist.
Funny Foreigner: Mello makes fun of Light and Japanese stereotypes while showing off his own very British mannerisms.

Good Parents: When Souichiro caught onto his son's growing mental problems, he pulled him out of school and worked with him to help his mind heal, giving him training that actually stimulated his genius and encouraging him to experience more of the world and just be a teenager for a while. He also suggested Light take on a quasi-legal hobby like hacking in order to train him out of his growing Black-and-White Insanity.

It's Personal: Loki blames L and Light for imprisoning him and personally targets them during his killing spree.
Leaning on the Fourth Wall: when building a profile for "Loki", it's mentioned that mangaka often use Norse Mythology in manga and anime.
Love Dodecahedron: Mello and Matt are in a relationship, but Mello still engages in some uncomfortable flirting with Light, and Mello and Matt make it clear they’re open to a three-way. Light dated Takada in college, had a brief but happy affair with Stephen Loud a.k.a. Gevanni of the FBI, and he went on a single date with Mikami before realizing how crazy he was and has been trying to avoid him ever since. Misa loves Light but they agree that they're Better as Friends. L and Light have been secretly stalking each other for the past year, and Near gets incredibly flustered around Gevanni and Sayu.

The Nicknamer: Aizawa nicknames Light as "Bocchan" or "young master" in reference to his enormous ego.

Not That Kind of Partner: Matsuda is Light's partner on the force. Mello asks if he's his partner in every sense of the word.

Pastimes Prove Personality: L plays the piano and Light took singing lessons. L quips that Light must like hearing the sound of his own voice. Also Matt and Light bond over hacking.

Religious and Mythological Theme Naming: The codenames of Loki and his crew are all based off Gods from Norse Mythology; in his notes, Loki also refers to the Taskforce as Asgard, L as Odin, Mello and Matt as Huginn and Muninn, and Light as Balder.

The Sociopath: Discussed; Light worries he would have become a sociopath had his father not caught on to his growing mental problems and disgust with the world and intervened. Light still worries he might become one seeing as mental illness never fully goes away.

Tabloid Melodrama: to Light's dismay, the tabloids become interested in the pretty boy cop that Misa hangs out with, and write up a trashy article about him which concludes that if he and Misa aren't a couple then he must be gay.