- Kennen was one of the champions chosen from the Ionian pool available during the Ionia vs. Noxus match.
- Kennen's dance is a reference to a breakdance move called an airflare.
- "Kennen" means "to be familiar with" in German and Dutch.
- The 'Eyes' in Kennen's quote of 'The Eyes Never Lie' when being picked may be referring to Shen, the leader of the three ninjas.
- Kennen shares a quote witih Shen: "From the shadows."
- Kennen shares a quote witih Irelia: "Balance in all things."
- Karate Kennen is a reference to the movie series.
- Deadly Kennen bears a strong resemblance to from the .
- Swamp Master Kennen is likely a reference to Jedi Master from the franchise.
- Kennen MD is part of a "Medical" theme whom he shares with his fellow ninjas, Akali and Shen. This is may a tribute to the webcomic series , which stars an eponymous medical ninja.
- Arctic Ops Kennen throws instead of and has two big kunais on his back.
- Kennen is a member of the Kinkou Order along with Akali and Shen. The three shadow warriors work together in order to preserve the balance in Valoran.
- Kennen and his fellow ninjas are at war with Zed and his Order of Shadows.
- However, unlike Akali, Kennen is more willing to forgive Zed if Zed is willing to seek redemption. 
- Kennen's parents reside in Bandle City.
- Kennen enjoys listening to Sona's music.