Original Source: [link]
This is Lucy from Elfen Lied.
I altered and edited the GIF, making a vector arm reaching out to the side, and coming back with a frappe for her to drink. It took me awhile, lots of steps in making the vector arm move without it being jumpy or scrambling all over.
If you wish to use this as an Avatar, please do ask me for permission first hand. I would appreciate that but otherwise do enjoy the GIF!