As it stands, you can animate your own characters from an external tool like Spriter, Animate, or create a png sequence yourself and pack it with Texture Packer. More options will be available soon, but making our own tool from the editor is low on our priority list.
The editor will be PC focused. While it will have a version that you can use in browsers, it’s highly recommended to buy a PC/MAC computer if you want to make games. Developing on an android device is unpractical.
So, yes in theory you’ll be able to make 3D games on an android device, but don’t do that.