[quote=@Nemaisare]
Aren't there quite a few energies out there that actually are invisible? >.>

And I'd definitely appreciate a notable NPCs list. Especially with one or two sentence bios, to give a quick idea what they do and how they might interact with the PCs. 

Actually, I had a thought concerning Lucas making himself useful, and I don't know how much Serena actually needs the help, but he might stick around her just in case. That, or just doing whatever anyone tells him to, really. 
[/quote]

There's numerous energies that are invisible, sound is among the first that comes to mind. 

Honestly I haven't fully fleshed out Serena just yet (so doing the NPC bios will force me to do that), unlike the other NPCs Serena is new to this RP, the others have appeared in the Vigilance Universe before.