Fun Facts about Summer Shiki:

1. The name of Summer Shiki's Noble Phantasm is
>"Manashiki - Izayoizanka"
which includes the kanji for her daughter
>Mana (末那)
and Shiki's lost personality
>SHIKI (織).

2. The title
>"Jade Rabbit"
happens to be pronounced in japanese
>"Gyokuto"
Which phonetically is very close to the surname of Shiki's husband
>Kokutou Mikiya