It must really suck to Pure Azurite, since if they are getting a magic-reduction, she might not have temperature regulating anymore, and those clothes don't look winter-ready.
In psychology, this is what is known as "misattribution of arousal", aka, The Suspension Bridge Effect. His heart pounds seeing her with a sword, misattributes the deep-seated unconscious trauma as romantic feelings.
It doesn't sound like this SCP is immune to bullets. Wouldn't a safer method be to shoot SCP-1400, then have a remote-control bot move the mask into a small container, rather than throwing D-personel at it?