How to create an halo

Hello to everyone
How can I put a halo of light controllable on a moving character.
I did not succeed with the gradient filter.
thank you for your help

Is this going to work for you?

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Used 2 Mask:Simple Shape filters. One set to overwrite, second set to subtract. Rotate and Scale to scale the halo. Size and Position to move it.

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Thank you Sauron for your answer,
What I’m looking for is to create a halo like a ray of light on a character who moves on a theater scene.
With the simple mask it is not possible because I cannot adjust the intensity of the light and its color and transparency.
I will try to do it with a layer to which I can adjust the color and transparency.
Unless you have a better idea.
Thank you again and have a nice day.