She has a peachy skin, long dark blonde hair and mint green eyes.
Siernna is into sports and is on every team! Although she is always very busy, she never loses her cool. She's very nice and is always upbeat and energetic.
Siernna spends most of her time in gym wear and workout gear, but that doesn't mean she doesn't look good! Siernna likes pastel colours, polka dotes, mini-skirts and funky accessories!
- Favorite Color: Blue
- Favorite Movies: Sports movies, duh!
- Favorite Books: Biographies of athletes - they help me to figure out my life goals!
- Favorite Music: Straight up rock 'n' roll gets me jumpin!
- Best Body Part: Strong, toned arms.
- Shopping Style: Finding stuff in sporting good stores that stylin enough to wear anywhere. 
List of Appearances
- Triiiplets (1st Edition)
- Sweet Dreamz Pajama Party
- Babyz Triiiplets (1st Edition)
- Hair Flair Music Stars Tour Bus
- Itsy City
- Sweet Dreamz Pajama Party (Funky Fashion Makeover)
- "Hi! My name is Siernna My sisters call me “Kickin' Kool-ala""
- "Hi, I'm Siernna and I'm a complete sports nut! I'm on almost every team, so I'm always busy, but I keep my cool - that's why my friends call me Kool-Ala!" 
- "Siernna is totally sporty, but even though she's always busy, she never loses her cool!" 
- Siernna (often spelt, Serena) is a name of Latin origin meaning "serene".
- Siernna was original given the nickname Kickin' Kool-ala but it was late shortened to just Kool-ala for unknown reasons.