That's not Irisviel, it's Illya from the climax of the Heaven's Feel route when she wears the Dress of Heaven and closes the Greater Grail.

Zhuangzi said:

That's not Irisviel, it's Illya from

the climax of the Heaven's Feel route when she wears the Dress of Heaven and closes the Greater Grail.

You're right.

Regular F/sn Illya
Winter coat F/sn Illya
Taiga Dojo F/sn Illya (aka Loli-Buruma)
Dress of Heaven F/sn Illya
Prisma Illya
School Uniform F/kl Illya
And two more (middle left and right) that I can't recognize.

Guessing middle left is Medea Caster equipped Ilya

worldendDominator said:

Regular F/sn Illya
Winter coat F/sn Illya
Taiga Dojo F/sn Illya (aka Loli-Buruma)
Dress of Heaven F/sn Illya
Prisma Illya
School Uniform F/kl Illya
And two more (middle left and right) that I can't recognize.

left is illya when she was in the forest with berserker during one of the flashbacks

right i think is swimsuit illya from f/ha