Iska is the main protagonist of the series. He is the current wielder of the Astral Swords and is determined to end what he considers a pointless war. 

He was the youngest Saint Disciple to ever receive the title; but after releasing a "witch" from captivity, he was stripped of his rank and imprisoned for life. Circumstances around the war against the Nebulis Sovereignty have led to his release, but his goals haven't changed. 

Iska has a moral code that doesn’t discriminate, even if a supposed enemy is at hand. He shows kindness and bravery, despite putting himself at risk, and even willing to risk committing treason for them. On the battlefield, Iska becomes very fierce yet also calm, not being afraid of whatever power his opponent has or taking dangerous gambles to protect himself from their attacks. However, Iska usually avoids cutting down most opponents when he doesn't see any value in doing so, simply knocking them out. This has led Iska to be known as a 'peace-loving war nut'.

(Source: KimiSen Wiki)

Embroiled in a hundred-year war, young Iska is sent to assassinate the Ice Calamity Witch, Aliceliese. Meant to murder each other, their initial encounter on the battleground creates doubt in their missions, but finding common ground together would make them traitors to their own countries. Though circumstances previously made them enemies, their now conflicted hearts may just make them lovers! 
 
(Source: Funimation)

__Height:__ 164 cm
__Hobbies:__ darts, driving, games, karaoke
__Skills & Abilities:__ acrobatics, karate, singing

[Profile (YU-RIN Pro)](https://yu-rin.com/pro-man/kobayashi-yusuke) | [Twitter](https://twitter.com/yusuke032510)

On January 1st, 2025, it was announced that he had gotten married to voice actress [Yumi Uchiyama](https://anilist.co/staff/106784/Yumi-Uchiyama).

__Non-Anime Roles:__
~! - Arslan in "Arslan Senki x Musou" (VG) (Japanese)
- Itaku in "Utawarerumono: Futari no Hakuoro" (VG) (Japanese)
- Opoona in "Warriors All-Stars" (VG) (Japanese)
- Ranmaru Mori in "Sengoku Night Blood" (VG) (Japanese)
- Sigurd in "Guardian's Violation" (VG) (Japanese)
- Takeru Akabane in "Code of Joker Edge" (arcade game) (Japanese)
- Terumi Niida; Kaoru Shishibara in "Prince of Stride" (VG) (Japanese)
- Tokugawa Ieyasu in "Hana Oboro ~Sengoku Den Ranki~" (VG) (Japanese)
- Tōshirō Shinano in "Touken Ranbu -ONLINE-" (VG) (Japanese) 
- Byleth in "Fire Emblem Three Houses-" (VG) (Japanese)
- Kalpas in "Honkai Impact 3rd" (VG) (Japanese)
- Xavier in "Love and Deepspace" (VG) (Japanese)!~

[Twitter](https://twitter.com/joaovitormafraa) | [Instagram](https://www.instagram.com/joaovitormafra.oficial/)

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A Mexican voice actor.

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

Voice actor. 

The second season of Kimi to Boku no Saigo no Senjou, Aruiwa Sekai ga Hajimaru Seisen. 
Iska guards Sisbell, sparking Alice's jealousy. Amid a conspiracy, can they thwart personal disputes and war? 
(Source: Crunchyroll News)

The Nebulis Sovereignty and the Empire are embroiled in a war without end. The Ice Calamity Witch, a Nebulis mage of incredible power, and Iska, the youngest swordsman of the Empire ever to become a Saint Disciple, find themselves face-to-face on the battlefield. Each seeks to bring a close to this ceaseless conflict. Little do they know, however, that their meeting will be the catalyst that shapes the fate of the world!
 
(Source: Yen Press)

Love is a battlefield.
 
For years, a great war has raged on between the scientifically advanced Empire and a paradise of witches known as the Nebulis Sovereignty. This age-old battle sets the scene for a fateful encounter between two young combatants: an imperial swordsman, Iska, and the witch princess, Aliceliese. As sworn enemies, they vow to cut each other down in order to unite their worlds, and yet Iska finds himself entranced by her beauty and righteousness, while Aliceliese is moved by his strength and resolve. In the midst of a never-ending war that forbids them from being together, they have no choice but to destroy each other—or can they find another way?
 
(Source: Yen Press)

A compilation of short stories set in the Our Last Crusade or the Rise of a New World universe.