**Hardness**: 10

One of the gems who mainly does patrol duty. They're partners with [Bort](https://anilist.co/character/123389/Bort). Despite Diamond's high offensive power, their toughness is second-rate and easily broken. The other gems consider them lovely and a top fashion model.

Diamond is friendly, kind, and gentle. They appear to be relatively calm during battle, even when their situation isn't good. However, they are actually insecure and frustrated with their current body which, though being the hardest, shatters easily. They dislike being compared to Bort, although they admire their younger sibling a lot. They are perceptive regarding gems' inner feelings and relationships, though [Cinnabar](https://anilist.co/character/123384/Cinnabar) accuses them of seeing everything as some kind of romance. Despite Diamond's more gentle nature, they're very stubborn and tend to fight until they shatter. From Bort's point of view, Diamond is extremely reckless.

~!Diamond is one of the gems who accompanies [Phos](https://anilist.co/character/123385/Phosphophyllite) to the moon. They tell Phos that they "want to go somewhere without Bort".!~

The Gems fight against the Lunarians, beings who attack them and use their shattered bodies as decorations. Each Gem is assigned a role, and Phos, the youngest, is assigned to create an encyclopedia of natural history.
 
Note: A promotional video that was released through YouTube in commemoration of the publication of the manga's first volume. 
(Source: HIDIVE)

In a world inhabited by crystalline lifeforms called The Lustrous, every unique gem must fight for their way of life against the threat of lunarians who would turn them into decorations. Phosphophyllite, the most fragile and brittle of gems, longs to join the battle. When Phos is instead assigned to complete a natural history of their world, it sounds like a dull and pointless task. But this new job brings Phos into contact with Cinnabar, a gem forced to live in isolation. Can Phos’s seemingly mundane assignment lead both Phos and Cinnabar to the fulfillment they desire?
 
(Source: Kodansha USA)
 
Note: Nominated for the 8th Manga Taisho in 2015.

In the mysterious future, crystalline organisms called Gems inhabit a world that has been destroyed by six meteors. Each Gem is assigned a role in order to fight against the Lunarians, a species who attacks them in order to shatter their bodies and use them as decorations. 
 
Phosphophyllite, also known as Phos, is a young and fragile Gem who dreams of helping their friends in the war effort. Instead, they are told to compile an encyclopedia because of their delicate condition. After begrudgingly embarking on this task, Phos meets Cinnabar, an intelligent gem who has been relegated to patrolling the isolated island at night because of the corrosive poison their body creates. After seeing how unhappy Cinnabar is, Phos decides to find a role that both of the rejected Gems can enjoy. Houseki no Kuni follows Phos' efforts to be useful and protect their fellow Gems.

**Height:** 153 cm (5'0)

__[Profile (Osawa)](https://osawa-inc.co.jp/women/kayanoai/) | [Official Twitter](https://twitter.com/_kayanomi) | [Twitter](https://twitter.com/kayanoai_0913) | [Instagram](https://www.instagram.com/kayanoai_0913/) | [YouTube](https://www.youtube.com/channel/UC0D6qi-Gr5RW7hqOvTEKmAw)__

__Introduction:__
Ai Kayano is a Japanese voice actress and vocalist currently affiliated with Office Osawa.

__Biography:__
Kayano wanted to work in a job that would involve "healing people", leading to initially take up a course at a vocational school. She worked in the beauty industry and became interested in acting after having seen [Aria](https://anilist.co/anime/477/). While attending school, Kayano continued working in the industry and paid for her tuition.

Kayano began working at Pro-Fit in 2010, voicing two supporting characters in the original video animation [Princess Resurrection](https://anilist.co/anime/9159/). In 2011, she voiced [Meiko "Menma" Honma](https://anilist.co/character/40592/) in [Anohana](https://anilist.co/anime/9989/) and received the Best Rookie Actress award for said role at the 6th Seiyuu Awards. Kayano, [Haruka Tomatsu](https://anilist.co/staff/95890/) and [Saori Hayami](https://anilist.co/staff/95869/) performed the series' ending theme "Secret Base – Kimi ga Kureta Mono (10 years after Ver.)", a cover of a song originally sung by the band Zone.

She is often praised for her vocal range, having voiced a variety of characters such as [Mayaka Ibara](https://anilist.co/character/55137/), [Mashiro Shiina](https://anilist.co/character/61371/), [Darkness](https://anilist.co/character/89363/) and [Akari Kawamoto](https://anilist.co/character/24311/) for example, none of which one would connect to the same voice actress.

**Trivia:**
- Worked part-time at a coffee shop with [Chinatsu Akasaki](https://anilist.co/staff/107652/) before becoming a voice actress.
- She got around 100 suggestions for her nickname in the Anohana radio show, from which she herself picked out Kayanon.

Non-anime roles:
- Atago - Azur Lane
- Graf Zeppelin - Azur Lane
- Kaga - Azur Lane
- Renown - Azur Lane
- Y'shtola Rhul - Final Fantasy XIV

[Twitter](https://twitter.com/MenzelSavanna)

[Instagram](https://www.instagram.com/tamaraveppo/) | [Youtube](https://www.youtube.com/channel/UC3EhmDaBlHLRrAUoaGJGMnQ/featured)

An Argentine voice actress.

[Official Website](https://www.rieke-werner.de/) | [Synchronkartei](https://www.synchronkartei.de/sprecher/3279/2) | [Instagram](https://www.instagram.com/strawbellycake/) | [Twitter](https://twitter.com/rieke_werner) | [Soundcloud](https://soundcloud.com/riekewerner) | [YouTube](https://www.youtube.com/channel/UCXcDQvUYX1oCtx53ueUAaEQ)

Rieke Werner, also known under the pseudonym StrawbellyCake, is a German voice actress and singer.