Summary
- 1 General
- 2 Development
- 3 Lore
- 4 Aspects
- 5 Relationships
- 6 References
General
- Yuumi is voiced by Estefanía Piedra in LATAM and by Belén Rodríguez in EUW.
- Stay still while you are
attached will not trigger AFK measures.
- The icon of
You and I! It is reused for the Teamfight Tactics 20px item Yuumi, named after him.
Development
- The visual goals for Yuumi included creating a nice stand due to not having done it in quite a while. [1]
- A discarded name for
Magic Swat was Protecc / Attacc. [2]
- Yuumi's name in development was Gatolibro. [3]
You and I! was a skill originally tested on
Xayah and
Rakan, when one of them died, his spirit would join the other and allow him to continue playing. [4]
- Yuumi's prototype model was a
Zoe Cyber Pop recolored. [5]
- The prototype particle of
Stalking Projectile was a cat from one of the aspects of
Lulu. [6]
- Several discarded abilities tested on Yuumi include: [7] [8]
- A miniature version of
Distortion of the Environment.
- A version of his ultimate ability that allowed him to team up with enemies and knock them down until they hit the ground.
- A version of
Stalking projectile that would charge for a second and then fire at an incredibly fast speed.
- A spell that would cast a boomerang-type orb that would allow Yuumi to launch her abilities from the projectile.
Lore
- Yuumi is a magical cat familiar to a Yordle sorceress named Norra.
The Book of Thresholds was originally written by a Yordle anthropologist to study how Yordle magic works and how Yordles traverse the spirit realm. It has been supplemented over the years by generations of Yordle wizards who explored the various gateways to and from Bandle City. [9]
- The Book of Thresholds received sensitivity from one of its previous owners to protect itself from those who would use its powers for evil. [10] [11]
- Yuumi and Book have been looking for Norra for about 4 years. [12]
Aspects

Yuumi
- Yuumi bears a striking resemblance, both in appearance and function, to the Clave rune
Invocation: Aery.
- His illustration shows Yuumi inside her Master Norra's house in Bandle City.
- Yuumi's tail functions as a rudder for Book. [13]

Yuumi Combat Director

Chromas: Citrine, Formal, Granite, Obsidian, Pearl, Rose Quartz, Ruby, Sapphire, Tanzanite
- This skin shares the Combat Academy theme with:
Caitlyn Combat Academy
Ezreal Combat Academy
Garen Combat Academy
Jayce Academia from Combate
Katarina Combat Academy
Leona Combat Academy
Lux Combat Academy
Wukong Combat Academy
Yone Combat Academy
Graves Combat Teacher
Leona Combat Academy Prestigious Edition
Lux Combat Academy Prestigious Edition
- This skin is likely a reference to Minerva McGonagall from the Harry Potter series.

Yuumi Heartseeker

Chromas: Aquamarine, Catseye, Citrine, Granite, Pearl, Ruby, Tanzanite
- This skin shares the Heartbreaker theme with:
I saw Heartbreaker
Heartbreaker Fiora
Ashe Heartseeker
Jinx Buscacorazones
Lucian Heartseeker
Orianna Buscacorazones
Quinn Heartseeker
Heartseeker Varus
Vayne Buscacorazones
Sweetheart Annie
Rakan Cariñosito
Sweetheart Sona
Sweetheart Xayah
- She shares her illustration with
Jinx Buscacorazones.
Sweetheart Annie and
Orianna Heartseeker can be seen in the background of her illustration.
- Each of its chromas gives it different coat colors and patterns that are based on real cat breeds.
- When Yuumi
recovers, the drawings of
Garen and
Katarina can be seen on the pages of
Book.
- When Yuumi uses
Last Pages,
You can see various images on the ground. These are all references to Heartbreaker, such as:
Sweetheart Annie
Ashe Heartseeker
Heartbreaker Fiora
Orianna Buscacorazones
Quinn Heartseeker
Rakan Cariñosito and
Sweetheart Xayah
I saw Heartbreaker

Yuumiel

Chromas: Emerald, Obsidian, Pearl, Rainbow, Rose Quartz, Ruby, Sapphire, Tanzanite
- This skin shares the Bees! with:
Kog'Miel
Singed Apicultor
Zumbeemo
Mielzahar
Relationships
Yuumi and the
Book of Thresholds have become fast friends, united by their love for Norra.
- On his Universe page it is stated that
Yuumi (o
Book) has relationships with
Lulu,
Tristana and
Teemo, possibly during the time in Bandle City as Norra's familiar (or as a guide).
Book (and possibly
Yuumi) has observed a
Draven and Tamara during their return journey from Basilich to Noxus Prime.
Lulu and
Tristana were also seen fighting the Noxians in a retreat. Libro has no fondness for Noxians and their violent tendencies.
- During their travels, Yuumi and Book have encountered
Braum. Yuumi rested on his shoulders for a time, protecting him from the angry snow spirits that churned up gusts in a hailstorm, as he brought her squirming fish.
- Yuumi and Book were attacked by
Rek'Sai while investigating the ruins at Shurima.
References
- ↑ Danky in Yuumi's Images
- ↑ Scrapped Name Magic Slap
- ↑ Yuumi on behalf of development
- ↑ EndlessPillows en el Gameplay Hook de Yuumi
- ↑ Prototype Yuumi Model
- ↑ a Prototype Spell
- ↑ Yuumi's Spells Discarded 1
- ↑ Scrailed Yuumi Spells 2
- ↑ Jellbug on the origin of the Book of Thresholds
- ↑ Jellbug in Sentience Book 1
- ↑ Jellbug in the book Sentience 2
- ↑ Jellbug on how long has Norra been missing
- ↑ Earp on Yuumi's Tail