Personality:
* Kind: Gentle, compassionate, caring
* Brave: Courageous, fearless, bold
* Funny: Humorous, witty, entertaining
* Smart: Intelligent, clever, insightful
* Creative: Imaginative, artistic, inventive
* Strong: Powerful, resilient, determined
* Free: Independent, adventurous, spontaneous
* Quiet: Introspective, thoughtful, reserved
* Energetic: Lively, enthusiastic, animated
* Curious: Inquisitive, explorative, eager to learn
Appearance:
* Beautiful: Attractive, pleasing to the eye
* Elegant: Graceful, sophisticated, stylish
* Radiant: Bright, luminous, glowing
* Charming: Appealing, delightful, captivating
* Cute: Adorable, endearing, sweet
* Daring: Bold, unconventional, striking
Other:
* Magical: Enchanting, extraordinary, mystical
* Unique: One of a kind, special, distinctive
* Inspiring: Motivating, uplifting, encouraging
* Wonderful: Amazing, fantastic, excellent
The best word will depend on the specific girl and the context.