i Register
In some senses, aidant is marked as obsolete, rare. Watch for register when choosing this word.
adj
helpful, assisting
All you unpublished virtues of the earth, / Spring with my tears, be aidant and remediate / In the good man's distress!
noun
One who or that which aids; a helper.
He said, "The court is now called upon to be an aidant to the enforcement of a judgment in rem, given by the Portuguese court," and then he said […]
More hindrances appear evident than aidants, or perhaps more about hindrances and barriers is recognized.