Does this look like MR, top left (and by deduction, HR bottom left)?
Members of House Addis at Summer Siege, June 2012
Odd that the woman next to MR would be holding a knife to the throat of the man in front of her, but I don't know the first thing about those role playing games.
Found on this page
House Addis - The Kingdom of Ealdormere Wiki
You are correct, that is MR and HR on the left of the picture as you are viewing it. As to the woman holding the knife, probably a joke between between the two people involved, who knows?
But I need to emphasize again, the SCA is not a 'role playing game', such as Dungeons and Dragons, etc., it is a medieval recreation Society. The only way I can try to explain the difference is that people who participate research a particular part of history, such as a time period and land, and then create a 'persona' that would fit into that time period and area. They are restricted from using the actual names, or pretending to be, any real or fictional people from history. They can not assume any 'titles' or 'roles' based on a historical figure, so someone couldn't decide to be 'Mary, Queen of Scots' and play that 'role'. What they do is try to learn as much about the daily life of the persona they have created, and try to recreate it as much as possible. However, they are still 'them', just them pretending to be a 10th century viking, or a 14th Century Englishman.
They are also not allowed to include religion in the SCA, not Wicah or anything else, unless done so privately.
While participating, they may chose to delve as deep as they wish into their chosen time period, or if they want, just scratch the surface. Many people with like interests hang out together and form 'households'. Unlike SCA groups, which are geographical, 'households' are not formally recognized, and are basically a group of people making an informal declaration of 'bonds' that have brought them together. Some households are 'military' based, some are structured to be like family, some are based on similar interests, like brewing, etc. There are no actual physical 'houses'.