Demon 44 is one monster that will give Bloodstained Ritual of the Night bestiary completionists a bit of a headache. Not only is it difficult to fight, defeating it by traditional means isn't the easiest thing to do.
Here's everything you need to know about where to find Demon 44 in Bloodstained Ritual of the Night.
Demon 44 Location
In order to find Demon 44, you'll first need to have unlocked access to the train in the Bridge of Evil area. This is done by progressing through Bloodstained Ritual of the Night's main story until you get the Passplate. The first time you enter the train, you'll have to race a timer as you dispatch monsters, so it's a good idea to clear the area before looking for Demon 44.
After you've entered the train, you'll need to go to the first passenger car. There, you'll find seats that you can interact with, right next to an open window. That's the location you're looking for. Sit down, wait long enough and Demon 44 will soon pop up.
Fighting him isn't easy as he deals damage by simply looking your way. Luckily, you can use the roof as a safe spot from which you can damage Demon 44 using ranged attacks. The single downside is that defeating it doesn't reward anything to benefit you when it comes to gameplay, but the satisfaction of a (potentially) completed bestiary will likely make up for it.