Age: 18
Birthday: November 20
Height: 133 cm
Weight: 34 kg
BWH: 61-47-62
Servant: Berserker
Affiliation: Einzbern
Classification: Homunculus
Likes: snow
Dislikes: cats
Famous quote: "I don't intend to kill you, Shirou. You're mine. I'll kill the other Masters, but you're special. That's why I locked you up here, so there won't be any interruptions."

A young Teutonic aristocrat, she traveled to Japan to participate in the Holy Grail War as a Master. Illyasviel has an angelic appearance and an unsurpassed degree of magical power. She lives in a castle on the outskirts of Fuyuki City, accompanied only by her Servant and two maids. Illyasviel asks those she feels comfortable around to simply call her "Illya."

Fate/stay night

Fate/Zero
Age: 8

Unlimited Blade Works

Fate/kaleid liner Prisma☆Illya
Age: 10
Birthday: July 20

(Source: Wikipedia)