I just looking for mods and I saw this detail on mod page. There is wilson and some characters walking in the forest. I looked carefully and I saw a thing. There is characters list from left to right in image.
WX>WIGFRID>WICKERBOTTOM>WILLOW>WEBBER>WILSON>WOODIE>WOLFGANG>"SECRET PERSON">WES
Maxwell and wendy wasn't at the picture. First I thinked this secret person would be Wendy bc. this person have long hairs. (Warly, woodie, winona and woodworm added game later and they are not main characters.).
But this person is not wendy. You can see her shadow in this image. Her hair attached at back and there is huge flower on her head's lefts. Also we can see the ears too.
If we look other characters too we can see Wheeler's hair look likes "a bit" to this person's hair. But the haircut of Wheeler look like "V" word but this person's hair look like "∩" so it's not same haircut. Also the shoulder of this person is higher than Wheeler's arms is bigger... Wheeler wearing pant but this person look like wearing robe or skirt.
And the other characters shadows here. None of them look like this person. I hope someone solve this mystery...
Characters and their shadow:
(DIDN'T FOUND SHADOW OF THESE BUT YOU CAN SEE DIFFERENCE EASYLY
and also sorry for my english 
