I need to defend myself against a crazy person...?

stay calm and be around good people don't act like you afraid of her other good people will push her out before she has a chance to attack you by being around good people I don't think she wants to make a fool of herself unless she is retarded like one of my coworker Karen who always want to get on my nerves.

There is nothing you can do, except on the day avoid contact with her and do not get into a screaming match.

If she makes a scene, step away from her, do not respond and comport yourself with dignity.

Others will see that you are not interested in causing conflict and security (or the best man) will remove her.

If you have already faced attack from this person, ask your friend's mother, or whoever is arranging seating, to ensure you are seated separately, and perhaps mention in advance that this person can become upset in your presence.

Ensure you stay with your friends, even when you go to the bathroom, and don't approach this person at all. If you seek confrontation or to 'deal with' the situation at your friend's wedding, you will simply ensure maximum drama and spoil your friend's day.

Cheers :-)

If she attacks you stand to the side of her and put her in a head lock and tell her to calm down and be reasonable. If you let her go and she attacks you again just take a big breath and then rush at her quickly with both your hands facing palm up at chest height and push her onto her back

Be mature and lady like. If she tries to make a scene, simply walk away. She will look like a fool, not you. If she causes a problem, she is going to have to answer to a lot of angry people. Don't be a part of it.

Maybe the two of you can agree to co-exist peacefully, just for one day.

It's a WEDDING. People dont behave like that at a wedding and if they do everyone there will think poorly of them and they will be removed. Just act polite and innocent, like "why in the world are you causing drama at this beautiful wedding" ha.

Tell them the God of Love should not have to tell His followers to use scare tactics, when a simple appearance will banish all doubt.

Im sure she wont react the way you think. Your confidence will actually intimidate her. Just stay calm and collective...basically on a more mature level than she.

Wow, well clue the bride in! she will not be happy if this crazy girl ruins her day! surround yourself with others n just walk away.

I would talk to the Bride right now and share your concerns with her. She can either mediate or maybe uninvite the "crazy" girl if she doesn't believe she will behave.

Dont react! She will be taken away from the wedding and then it will be all good so dont wory!