One of the traits Fen picked up quick from his assignments as a bodyguard was to be alert to all those present around his charge and to react instantaneously to anything that may be regarded as a threat.  It had become second nature to him and something he mostly does out of reflex.  So in the instant the demoness lashed out with her tail, Fenris had been halfway out of his chair with only the last foot of his massive greatsword left in its sheath.  He froze, eyes cold and unreadable as he watched the lock of hair fall free from its owner only to be claimed by the fiend.  It only took a moment to deduce the strike was not one of aggression and with a long blink of his eyes they regained their lightheartedness.  With a calming exhale and a clearing of his throat, he returned the blade to its sheath and lowered back to his chair.<br/><br/>Fen took another drink to help take the edge off the adrenaline that was now coursing through his veins.  "Well,"  He said voice back to its casual tone, "that was interesting." In his mind, he began to size up the fiend; a habit of his to all he is assigned to work with or go up against.  The sight of her strike gave him some insight to her capabilities as well as her customs and character.<br/><br/>His gaze fell back to Alexander, a wolfish grin spreading across his face.  "Should you find yourself in a more intimate setting with her, I suggest not doing anything to aggravate her.  You may lose something precious to you before you even realize it was about to be taken away."