yup, thats a salamander party
and that many player in a party with that expensive equipment is usually for boss raid(u know, tanker + support healer + magician), and they use that to chase 2 player(u can trace the plotline there)
meaning more badass Kirito moment again next week
oh and for those wondering about the mirror and the password, i'll just quote from the LN since its a bit troublesome to explain it
first of all is the door
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"It was a wonder how he could still do this kind of troublesome thing instead of just using his administrator's privileges to directly open the door. Apparently, Oberon has his own sense of aesthetics, he doesn't want to bring system related things here. He just wanted to be a fairy king, with an imprisoned fairy queen to abuse.
It was a stupid performance."
and the mirror
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"Oberon used Nerve Gear to connect to the virtual world, but his time in the virtual world is limited. Therefore, there are a lot of things that he does not understand. For example, in the virtual world, mirrors do not comply with optics.
Asuna pretends to cry, straining her eyes in the mirror from close range. There, clearly reflected, is Oberon, an image with a clarity far too high. In the real world, no matter how close your eyes are to the mirror you can't see far away objects. Here the mirror is just a ultra-high resolution screen and the distance effect doesn't apply. Thus, even the activities of Oberon's fingers are clearly visible.
This was an idea Asuna had thought of long ago. However, when Oberon left the prison, she didn't have a chance to be close to the mirror. Right now, Asuna was able to take advantage of this opportunity.
... 8... 11... 3... 2... 9......"