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For altering images, just about any image editing software will work.

Bee-a (front) from Remi
Bee-a (side) from Remi
Tender Bee-a (front) from Dream of Doll website
Tender Bee-a (side) from Dream of Doll website
Hoo (front) from Dream of Doll website
Hoo (side) from Dream of Doll website
Si (front) from Dream of Doll website
Si (side) from Dream of Doll website
Too (front) from a Yahoo!Japan Auction
Tender Too (front) from Dream of Doll website
Tender Too (side) from Dream of Doll website
U (front) from Dream of Doll website
U (side) from Dream of Doll website
Wi (front) from Dream of Doll website
Wi (side) from Dream of Doll website
Tender Yen (front) from Dream of Doll website
Tender Yen (side) from Dream of Doll website
Yen (front) from Hoolijing
Yen (side) from Hoolijing
Tender Zen (front-ish) from Radiotrash