Sakura and Kiri are playful pumpkin-headed spirits. They are extremely small in size. They provide Susukihotaru, Bonbori, and Hozuki branches of cherry blossoms which are used as weapons by pulling the branches out of their mouths.

Sakura is a little girl, so she should be a higher voice because they are children. 

Kiri is a little boy, he should sound like a child as well.

If you can pull of two little kids audition. If not, you can audition for one or the other. 

Line One both children are excited to see soliders and are running around them. 

Line Two Sakura and Kiri are playing, and lightning just hit, so she's offering up an idea for them to do. 

Line Three Kiri is cheering on the Lightning in his innocence.