How does one make a character fade away, I am trying to have two characters, one disappears and the other appears within the same bodies?

Keyframe the objects material transparency
Use the compositor / video sequencer to fade out the object which is on its own render layer

Can you guide more in detail. I am in my seventies and need step by step…thanks

Are you using blender internal or cycles? The process is similar but it’s not the same

I am using regular Blender Render

Make sure your at the starting frame for when you want the transparency effect to start and right click the Alpha slider and click Insert Keyframe, then use the timeline to select when you want the transparency to goto 100% and set Alpha to 0 and right click and select Insert Keyframe.

Great, now remember I will have two bodies inside one character, will this work too. I want of those bodies to disappear.