I'm not sure - I don't have pleco caves - she uses a cave I made with rocks. If I didn't have that I think she might. It's hard to say. She is always in it in different angles so I'm not sure (vs. the long style of the pleco cave.) She is definitely more cave-oriented than my BN, though, who likes to hang in/on the wood.
I am just so in love with the sevs! Why must they eat plants?!?
I'm giving up on the plans for any plants for the sake of having this tank haha. They are quite the spectacular fish!