"Play a weapon from your hand on one of your characters (paying its cost). You may activate that character ."

Does it allow me to activate the character even if it is exhausted?

No. Exhausting the character is part of the cost of activating it. If you can't exhaust it because it is already exhausted, you can't activate it.

3 minutes ago, kingbobb said:

No. Exhausting the character is part of the cost of activating it. If you can't exhaust it because it is already exhausted, you can't activate it.

Tnx!