Check how Kangiten is doing.

Obviously using the doll in a public place would be really bad. Bathrooms or the locker room seem like the most obvious place to try doing it but the idea comes to mind. If that's the first place you think of, then it's the first place that everyone else is going to think of going to hide whatever they're doing. Whose smoking or cutting class isn't as important as what you're doing however.

The idea comes to mind to use the counseling room. It's a private room, that's unoccupied outside of appointments. It's never locked and it is one of the other main places, people usually go to make out or whatever else. As you make your way in and get the doll out of your bag, you do remember to lock the door behind you. If anyone gets really pushy, you can always just as you have an appointment.

Closing the blinds is also helpful from prying eyes and it's a quick flick of the lights to brighten the place up. Grabbing the doll and holding it close, you try to focus on using it as a beacon for demon energy. It's about a solid ten seconds before it starts to shine and those weird symbols start to appear on it's body. This is taking longer than normal. It's still not long before a bright flash shines in the room.

"Heya! How are you feeling?" Perhaps it isn't the most polite way to talk to a divine deity but the bright blue elephant man doesn't seem to mind. The pink girly elephant lady he's embracing doesn't really acknowledge you. It never does. As far as you can tell, they're both Kangiten.

"Nana. As energetic as ever. Again. I've told you this already, but forgive me if I have trouble grasping this language. You mortals have so many silly tongues." Kangiten is as polite as ever even as his hand slips to the elephant lady's rear and gives it a squeeze. "You said we needed to get ready today."

"I did. I was a little worried you weren't listening to me." He still doesn't really look at you as the pink elephant's leg wraps around one of his and they press really close together. "You guys, are really frisky today, aren't you?" He laughs it off as he takes a glance at you. "I suppose so. It's just getting to be that time of the month. I'll tell you about it later. Here's what I need you to know. You probably had trouble using your doll to summon me to begin with, correct?"