I lurk about 95% of time so I thought I would give this a shot.
Using my present avatar because I'm too lazy to go through my outfit closet.
Name: [NPC] Atheral
Would you run a shop?
No, will be too distracted playing on a hand held game system than to bother to watch the shop.
What kind of items would you sell?
Please refer to the previous statement.
Would you appear in the manga?
Yes, but only as a background character. Floating around munching on sweets; playing Russian roulette with food; and buying all the delicious discounted chocolates in stores after the respected holiday's event ends.
Would you be a part of an event?
I would love to! Seeing that Atheral is an incubus, I would say he'll probably troll the Valentine's Day event? That or anything that has to do with pastries and chocolate. (Big sweet tooth, major chocoholic).
A love triangle?
No, too inept in developing romantic attachment to anyone.
A horrible villain?
Not really, he prefers sitting in the area of grey.
Any specific phrases/quotes?
"*Grins*....Interested in a little game?"
"*sniffs* Is that... Chocolate I smell?"
"Since you failed to complete the task, how about a little punishment game?"
"I much as I do love good store bought chocolates, they are only enough to tie me down until I have time to make my own goodies."
For holidays
"Ugh... What is with all these decorations?! There is glitter on everything! It is the glitter-apocalypse!"
"*Sneezes* Ugh... I think I breathed in enough glitter that the fabulous in my lungs will reflect x-ray radiation."