Just dropping this here, but this is the blank template I use for my characters - 

Name: 

Race: 

Age: 

Height: 

Weight: 

Hair: 

Eyes: 

Skin: 

Build: 

Clothes: 

Accessories: 

Powers/Skills(If Applicable): 

General Personality: 

Background: 

~*~*~*~*~

Not saying you have to use this, however if you use your own template and it doesn't have all the info I will be asking a lot of questions to fill in my mental blanks, and if you do have all the info but the info is compacted(As in several of the sections I have up there are all put into one para, eg., "Appearance" to cover all physical attributes) I will likely put all your info into my template and drop in it the first post for easy reference for me. Oh, and I am morally opposed to using pictures unless the picture was specifically drawn for your character.

Now, on to your question. Hmmmm. . . . .I'd say they are impervious to the weapons of man, the wings can be made invisible, and I like the idea of them being able to summon their weapons as oppose to having them strapped on somewhere. Strong, but say a mob of people could pin our guys down, but stuff like ropes do nothing. Chains. . .Depends on thickness, however the weapons can cut through just about any substance. Anything not heaven or hell made. Your thoughts?