Okay, so Kairi will be visiting the shrines and will leave some offerings here and there. If you're interested in her visiting your character's grave, let me know!

Kairi's grave will be fairly simple. Some sea shells and tropical flowers probably arranged in a wicker basket on top of a tombstone that simply has her name on it. SPOILERS!! Here is the video of how Kairi actually died. She wasn't conscious during her death, so anyone leaving an offering would probably just experience darkness and then a severe pain across their back.

The shrine will go unguarded, so anyone who wants to visit can do so.