1. Holly & Rudolph (Japanese duo) are en route to deliver three gifts to three different houses. Holly decides that she wants to show off a little. Hilarity ensues. They return to face the other Northern Lights who all act like their errands went smoothly and chastize Holly for her late return. As the file out however, Santa lets out a half humored, half concerned sigh as he recants the events of the other Northern Lights to us as the readers.
2. The Egyptian duo are sent on a retrieval of coal from the mines of Ol' King Coal in upper Africa. They blow it up on accident due to a fight that broke out in the lower levels and a misjudgment from Blitzen. As per the Christmas Ninja tradition.

3. The American duo are sent to Miami to oversee a test of Christmas spirit for one specific man stuck on the neutral list. The one they meet up with actually turns out to be the wrong person and is subjected to so much random crap he walks off enraged and his resultant actions drop him off the good list for 3 years.

4. The French duo are sent to Italy to retrieve Santa's special Christmas special pizza only to find out that they arrived there late. Meanwhile, a minion of Ruprecht runs them around the entire European area saying that they can get another pizza from him if they go through with it. They catch him, beat his ass, and return to Santa... With an empty pizza box and a lulzy comment from said minion.
5. The Jamaican duo go off to the West Indies to meet with the Sugar Plum Fairies in an effort to get them to make some last minute fruitcakes. They decline, pissed off as hell since they haven't gotten a break from this job in years.

6. The Antartican duo have to deliver CocaCola to the Polar Bears of the North Pole and Pepsi to those at the South Pole. They get the orders mixed up and wind up having to play damage control and stop a potential gang war due to the mix-up. (Yes, the Bears refer to their respective areas as their land, and they're pissed when they find out the other "gang" has their stuff.)

7. The Brazilian duo set out for the mountains of Argentina for a specific type of berry the Sugar Plum Fairies need to finish the batch of fruitcakes they got coaxed into making. Meanwhile, Ruprecht who has been scoping the area in search of those fruits is currently in the process of hoarding it all.
8. The British duo are sent for a miniature replica of Big Ben from England's premier toymaker and ally of Santa. They get the order mixed up and actually take THE Big Ben from London using their Arts of Advent and bring it back, only to be told to bring it bad and quick due to a midnight celebration that was to take place there.
9. The Indian duo are sent to meet Jack Frost and ask him to alter the amount of snow in one area of the world. When they arrive, they find him asleep and decide that they would use his machine themselves. They accidentally freeze everything along the equator, affecting most of the other Northern Lights' events in play (for better or worse).
Final Note: No, I'm not trying to make them all incompetent. I just want to make their intro stories humorous. The story doesn't take itself too seriously and always gives room for a laugh or two.

Also, these might be weak since I improvised them on the spot, but I'll try writing up more clever scenarios soon.