Illustrious is a Super Rare aircraft carrier of the Royal Navy’s Illustrious-class, characterized by a tall, slender silhouette adorned with long white hair swept into a low ponytail, vivid blue eyes, and attire blending naval tradition with refined elegance—a white sunhat, frilled skirt, and thigh-high socks completing her poised aesthetic.

Functioning as an armored carrier, her combat prowess centers on summoning protective barriers around allied vanguard ships during airstrikes. These shields absorb damage equal to 5–10% of her maximum health for 8 seconds. When enhanced by her augment module, the barriers trigger a specialized barrage and restorative effect: if shattered prematurely, the protected ship regenerates 3% of its maximum health. Her defensive focus extends to an aircraft loadout of two fighter squadrons and one torpedo bomber squadron, prioritizing survivability over offensive versatility.

She exudes a serene, duty-bound demeanor infused with religious reverence, often invoking "the holy light" in speech. Though compassionate and forthright, her strategic acumen shines in anticipating and neutralizing threats to allies. Loyalty defines her actions, consistently favoring collective security over personal advantage.

Historically, her class’s armored flight decks offered exceptional resistance against aerial assaults. In-game lore notes her collaboration in joint operations, including 1944 Indian Ocean campaigns alongside Saratoga. Beyond faction-based engagements, no specific media appearances or spin-off involvements are documented.