How to make green color glowing line around player character

Today I’m gonna come to ask, How to make a green color glowing around a player character like this picture
image (Like the woman who are flying, and the sword)
I have to try to search in DevForum and Youtube, But I don’t see the solution that related to my problem

Thanks in advance
Sorry for the bad English


You could try making parts that outline the player, with transparency and neon material, then weld that to the player.

Oh, But i don’t know how to script it, because this gonna to be some of my fly move in some of my power.