Issue #20873: Vilkas may attack the player character during Companion initiation quest
It's possible for Vilkas to attack (and kill) the player character during the training quest. While [[https://www.youtube.com/watch?v=13BSDunHUOU|this video]] is obviously from a modded game, the bug can be reproduced in vanilla by setting a (much) higher difficulty setting.
This should obviously not happen because there's plenty of dialogue to support that Vilkas doesn't want to harm the newcomer.
I have found two ways to deal with this issue. The first is to edit the csHumanMelee_AllD [CSTY:000A34EE] combat style and set the defensive mult to 2.0 instead of just 1.0. This worked well in Requiem and in my game Vilkas never attacked me anymore.
We still had reports of him attacking players however, so I had to add a second safeguard. This is done by assigning Vilkas a perk that nullifies his damage output during the training mission, during which Vilkas doesn't seem to attack anything else but the player. So even if he acts evasively, there's no damage done.
Proposed fix: http://afkmods.iguanadons.net/index.php?/files/file/1815-prevent-vilkas-from-killing-the-player-character/