i dont think you understand the love triangle that was going on in the lore of lamordia. Clearly Viktra was making moves on the juggernaut and he bolted as soon as you walked into the bedroom. Who wouldn't bust out of there! you're chilling in the bedroom and an adventuring party bursts in instead of Viktra.
its not like the just spawned the juggernaut in with no lead up. would you have preferred it be a giant bear in the bedroom?
from the wiki page for snowfall and sunlight:
You can now head south into Elise and Viktra's abandoned bedroom, where, for some reason, she's keeping a Relentless Juggernaut – a monstrous killing machine created from the body of a mortal that swore its soul to a powerful fiend in search of vengeance. Mordenheim, with her typically shaky grasp of scientific responsibility, has received the specimen from the Ludendorf police after some sort of incident at Ludendorf Wax Museum, but as she's busy with another experiment she has stuck it in a corner hoping it will starve to death – so naturally it breaks out and escapes Schloss Mordenheim the second you walk in (the Juggernaut proceeds to return to the Wax Museum, and will later rear its ugly head as the boss of the raid
Relentless.)
Viktra and Elise, Snowfall and Sunlight. maybe should've been Snowfall, Sunlight, and a s