|Champion||Background||Strategy||Skins & Trivia|
- Nunu is the name of one of the developer's dogs. He also uses it as a nickname for his wife.
- In thermodynamics, refers to a state where the temperature of a system is at the theoretical lowest possible limit: approximately -459.67 degrees Fahrenheit, -273.15 degrees Celsius, or zero Kelvin.
- Nunu was designed by Guinsoo.
- The Yeti's name is Willump.
- After changes to Zilean's Chrono Shift AP ratio, Absolute Zero has the highest single AP scaling of 2.5 damage per 1 AP in the game.
- Nunu is voiced by Cristina Ulloa, who also voices Amumu and Annie. Willump is voiced by Brian Sommer, who voices Tryndamere and Warwick.
- Nunu and Willump will drop one soul each, for a total of two souls!  It is a Hidden Passive.
- While similar, Sejuani and Bristle only drop one soul between them. This had led to a joke among the community that Sejuani has ginger hair in reference to the internet meme that gingers have no soul. 
- However, Katarina, Leona and Miss Fortune are redheaded and do drop a soul upon death.
- Sejuani and Bristle's case may also stem from the religious belief that animals have no souls.
- Nunu's taunt is a reference to from .
- Nunu's joke is a reference to famous quote, "Speak softly and carry a big stick."
- This skin is a direct reference to two characters, Oscar the Grouch and the Cookie Monster.
- This skin is a reference to Angry Goran's Nunu Bot series.
- The screens in the artwork also references the series, displaying the words "Push" and "Uploading A.I.".
- This skin is a reference to "Master Blaster" from the movie Mad Max Beyond Thunderdome.
- It may also be a reference to from the series.
- This skin is related to "Taipei Assassins", who have won the League of Legends Season 2 World Championship finals.
- He shares this theme with Dr. Mundo, Shen, Ezreal and Orianna.