They're under this license : CC BY-NC-SA 3.0
I'm uploading them in their .psd files so you can change their size and some of their colours.
DL Link :
Male Bunny Hat Sprite
Little Boy with Cat Ear Hood
Girl Head Sprite
Update [26/05/15]
Basketball Boy
Update [10/06/15]
Male Sprite Silver
Male Sprite Keith
Update [05/09/16]
Male Sprite Crown
Update [07/02/17]
Male Sprite Stripes
Update [09/02/17]
Short Hair Girl
Update [10/11/17]
Watercolor Sprite Test
Update [25/07/2018]
Female Sprite Red Tie
Update [01/08/2018]
Male Sprite Blue Suit
Update [11/01/2019]
Cat Pet Owner
Update [02/25/2019]
Male Bartender
Update [08/27/2019]
Female Sprite With Otter
Update [20/02/2020]
Blue Female Sprite
Update [17/08/2020]
Fan Male Sprite
Update [12/09/2020]
Kimono Female Sprite
I hope they will be useful, you can use them as placeholder too
oh and if anyone decides to use them, please do tell me. I'd love to know what they'll be used for!