The environment is at least half-familiar, but that doesn't mean Add has to be happy about it. He is happy to have his six dynamos working again, even if he still has no idea why they suddenly decided to start working... frustrating as it may be, he's not going to complain about a good thing. It means he doesn't have to walk anymore, so he's absolutely taking what he can get here. A hoverboard made up of six tiny robots is clearly the superior mode of transportation.

But aside from that, this place sucks. Wasn't one trip inside a giant monster enough?! And the train tracks are just weird... what kind of freak would build a train system inside a living creature? Who would ever ride that train? Hell, he hasn't even seen any trains yet, so why build the tracks at all if they're not even going to be used?? It's stupid and gross and he wants to leave.

Alas, leaving just isn't so simple... so for now he's been wandering around aimlessly, occasionally stopping to pummel some shadow-monster to death. It does little to ease his nerves. He hasn't run into anything he can't handle yet, so why does being here make him feel so anxious...?

The tunnels always seem to be echoing with distant voices, but it's a long, long time before Add actually bumps into another person. He freezes in place, drones positioned in a tight arc by his hand.

"... Hey. You're real, right?" A hint of hopefulness, but he's prepared to fight if they make a wrong move.

[OPTIONAL Prompt A-1: Trust No One, Not Even Yourself is also in effect.]

Add has a few more exploration tricks up his sleeve. He can't risk losing too much of his arsenal, but he can spare a single drone to scout the area ahead. So, instead of Add himself, you may come across a lone dynamo hovering its way through the tunnels. Upon detecting a new presence it stops in mid-air to investigate the anomaly, flashing some scifi-looking scanners around.

Or... it might be stuck. It's not the smartest little drone, but it's trying its best. It might need help getting unstuck from whatever weird jam its landed itself in.

Either way, it eventually gets a status report through to its master and a crackling voice comes out of the tiny machine. "This is Add, identify yourself."

Behemoth—or Mementos, or the void, or whatever he's supposed to call it now—seems to grow more agitated the further in he travels. Add is trying to be careful not to damage the tunnels, shockingly, but it's hard when everything is already trying to kill him. It's in the middle of a fight with some shadowy demons (literal demons, they have the wings and everything) that he suddenly finds himself cut off by a wall of angry tentacles, swinging towards him with their gaping, gnawing mouths.

The tunnels flash with bursts of lightning, and Add stands at the centre of the chaos with his body wreathed in a crackling aura. Each strike he delivers comes with a blast of energy, tentacles and nightmares alike crumpling to the ground with a smoking stench... only for more enemies to spring up just as quickly as he can fell them. He's quick to react, dodging and deflecting what attacks he can with a shield-like barrier, but as the fight drags on his movements are starting to get more sluggish...

He's not in too much trouble yet, but it is getting a bit dangerous. Maybe he could use a hand?

The only path forward is down. Logically, that means they'll find answers at the heart of this place, right?

In hindsight, that doesn't really make much sense. Who says there has to be any answers at all? Still, he made it all the way down here, and he was at least able to confirm something. After seeing the heart for himself Add parks himself outside the chamber entrance, unwilling to re-enter but unsure of where to go next. He appears lost in thought, but he looks up when someone else starts to approach.

"Don't bother. What's in there... isn't something you should be messing with." oh yeah, that ominous warning will definitely keep anyone from going in and fucking with the heart.

((Feel free to hit me up at BlueFlewFedUQueen or Lavvy#1238 on Discord if you have another idea!))