hehe--I still pull out that quote when people ask me what I am going to do today

Regarding
TRAPS--this is a fairly complex topic and one I suspect Ameera (Iriana) is not prepared to deal with as far as game mechanics. And realistically I am not sure of any easy way to have her set (I assume mechanical type) traps on each door? I am certainly open to a player figuring out how to do this--but I don't think it is appropriate to just roll a generic skill check just because Ameera is a Rogue--this would need to be a specific Craft skill (at least Carpentry for something simple for example--or more appropriately "Craft, Trapmaking".) Which no one has at this point...
This is something that Ameera (or someone else) could research and learn during downtime if she wants to try that--with the skill it would just be a matter of picking the DC (difficulty class) of the trap and then making the roll. Assuming the ingredients are available. I will allow that Ameera found a book on traps (the above link) to learn from. But until she has a skill point in it she would not be able to do this as an untrained skill check. You guys will be hitting level 3 here pretty shortly which will add some skill points to use for this.
This may be something you all would want to brainstorm about--as far as what kind of trap to use and how to go about gathering the materials needed to make them--there is a good supply of items in Obligate's cavern (and elsewhere) that could be used for this--but it is going to take some planning on your parts.
Keep in mind that the standard doors here (which is most doors) do not have locking mechanisms or even clasps of some kind--they just have the pull ring on both sides. The easiest solution in many cases would be to just block the door from opening--the door you just went through could have this done with a hammer and a piton and a bit of elbow grease--but someone would have to do it from the other side (the direction it swings in) and then move through the other secret doors in Obligate's room to get back around. But this would be a way to prevent random movement for the more simple demons--although it may also inspire a search to find out why the door is blocked... Obligates area is particularly important of course--since you don't want to expose its existence to any other creatures.
Another very good option (yes I'm tired of waiting for Jennaver to take the time to go over Sheen's spells

is Sheen's
Permanent Image spell (1/day spell like ability). If a creature doesn't see a door they won't try to open it... This won't work for all creatures--but it will work for many.