What is it with Mexicans and death?
Goth Kid forms an appearance as a light-skinned child with dark purple, short hair that have his bangs covering their entire eyes. He is shown only shown wearing a school uniform, consisting of a red vest with a white shirt underneath, black pants, and dark grey shoes; He carries two slits on his wrist. In Snoop Dogg's "Tombstone Hill" video, Luka is seen wearing a long black T-shirt with the quote "Hey Fatso" written on the front, blue ripped jeans, two slits on his wrists, and white black striped Adidas shoes.
In The Book of Life
Luka is first seen with his friends Sanjay, Jane, Sasha and Joao when they came to a museum on class flied trip where he shot a spitball at the tour guide Tomas and said "Bullseye" he and other kids exit the bus, Luka and all of the other children (except Sasha) are not happy to be at the museum. Luka is last seen at the end of the end credits in Snoop Dogg's "Tombstone Hill" video writing graffiti on a grave and doing Snoop's dance as he is surrounded by zombies.
- Luka is Mexican-American.
- Luka asks "What is it with Mexicans and death?"; this refers to one of the tweets from Jorge R. Gutierrez's Twitter website, where he have a conversation with Guillermo Del Toro.
- Luka is somehow related to Maria. She was not an only child.
- Luka enjoys heavy metal, especially Gorillaz and Snoop Dogg