[Sebastian was, of course, aware of the monster behind him and was planning on turning around and countering just as it bore down to strike him - provided that the monster in front of him had died by then. Said monster is surprisingly alive for having just had a knife buried to the hilt between its eyes.
Anyway. He turns his attention from the monster he's currently engaging for a moment, giving Fenris a quick glance while still keeping the knife firmly in place.]
Thank you! [He doesn't sound tired or even particularly stressed despite having been swarmed with monsters since the start of the event - at most he's frustrated that they just keep coming no matter how many he slaughters and he never gets a chance to better assess the situation. It's also a bit irritating that the one deep cut in his shoulder won't stop bleeding (it's been at least thirty seconds and it still hasn't healed, how utterly absurb).]
Although should this continue for any length of time, I'm afraid the bad aftertaste might be unavoidable. [You know what, he's going to kick this monster square in its chest, hard enough for it to fall backwards. That's one way of getting his knife unstuck for another killing stab attempt.]