Here are some Kingdom Hearts-inspired names for a Keyblade Wielder, categorized for different feels:

Strong & Determined:

• Veneficus Rex: (Venomous King) Evokes a sense of power and perhaps a slightly darker, more serious character.
• Aethelred Valor: (Noble Courage) Combines a strong, old-English feel with a virtue.
• Lysander Fortis: (Liberator Strong) Suggests a character who fights for freedom.
• Caelan Argentum: (Heaven Silver) A more elegant name with a hint of mystical power.
• Rhys Ironheart: (Passionate/Fiery Iron Heart) A strong, memorable name suggesting resilience.

Mysterious & Enigmatic:

• Zephyr Umbra: (Gentle Breeze Shadow) Hints at a character who is both light and dark.
• Nyx Nox: (Night Night) A simple yet evocative name suggesting darkness and mystery.
• Solarian Dusk: (Solar Dusk) A beautiful and slightly melancholic name.
• Seraphina Tenebris: (Seraph Darkness) A celestial name with a dark twist.
• Elowen Silentium: (Elm Silence) Suggests a quiet, observant character with hidden depths.

Light & Hopeful:

• Liora Lux: (Light Light) A simple, bright name representing hope and purity.
• Elian Sol: (Sun) A classic, sunny name.
• Aurelia Stella: (Golden Star) A beautiful name suggesting brightness and guidance.
• Rian Dawnbringer: (King Dawnbringer) A powerful name suggesting a bringer of light.
• Aella Lumen: (Swift Light) A name suggesting speed and brightness.

Unique & Quirky:

• Jett Stream: A modern, energetic name.
• Cosmo Comet: A playful, celestial name.
• Pixel Heart: A name referencing the game's style.
• Kairi's Echo: A name referencing a key character. (Consider if this is appropriate for your story)
• Roxas's Legacy: Similar to above, referencing a key character. (Consider if this is appropriate for your story)

Remember to consider the overall tone and style of your story when choosing a name. These are just suggestions, and you can mix and match elements to create something truly unique.