Anime Banzai 2012

[Mermaid Dottie]

So Anime Banzai is the local animecon where I live. It comes every october, and I was hoping to go along with the theme this year, which is Japanese Mythology.
My only problem is, What do I cosplay as?

There are several aquatic based demons or spirits in japanese culture (along with several others ranging from terrifying to comical).
Here is my list that I gathered;

Water Based

• Amikiri- Net-cutting spirit. Protects ocean creatures from humans.
• Funayurei- Ghost of someone who died at sea.
• Isonade- barb-tailed sea creature.
• Kappa- see here
• Kawa-uso- A supernatural river otter. I imagine it as something like a selkie from Irish folklore.
• Mizuchi- A Water Dragon
• Ningyo- a Japanese version of the mermaid.
• Nure-onna- A female snake-like monster who appears on the shore.
• Shoujou- Not really for me, but It reminded me of a friend. A red-haired sea-sprite who is very fond of alcohol.

Others

• Harionago- A woman with a thorn-like barb on the tip of each strand of her hair
  
• Jorogumo- a Spider woman
  
• Kirin- Chinese Unicorn. I've always loved this depiction.
  
• Kiyohime- A woman who transformed into a serpent demon out of the rage of unrequited love.
  
• Tenin/Tenshi- Japanese version of a western Angel or Fairy.
  
• Yosei- the Japanese word for fairy.
  
• Yuki-onna- a snow woman.

It's just so hard to decide... and then the whole design process.....
Can you guys help me?

[Thalassa]

Oh! I'm hoping to get up to AB this year (I've been every year for 3 years but this year I work...:-( ) and still have nothing to go with the theme.

Technicality-wise I thing the Funayurei would be easiest, but the Ningyo sounds like it would be a lot of fun.

[Mermaid Dottie]

Oh! I hope you can get up to banzai, too. What would you be going as? I'm actually thinking the Ningyo would be simplest, since I already have a tail, but I've kind of always wanted to do something fairy-like, too....

[Thalassa]

I'm not really sure. I was going to go as part of a group that were doing a unique Ouran cosplay, but since I won't be there most of the time that would be not good for them. I'm trying to research mythical stuff now (which is why I'm so glad you posted this).

[Mermaid Dottie]

My husband was trying to look up which demon it is that this mask of his represents, but he couldn't find it. That's what led me to this. Of course, there will also be him and my baby boy, too....