I had a sort of running joke with my other materia. I told them to help out with a silverfish problem I was having. I was getting a couple per week whenever I got home from work. I then told my 'crew' that I didn't want to kill the bugs, I just wanted them to not come in my apartment. I got back 'we know' and a sort of smile as an answer. I think they liked getting the feedback from the success of our joint endeavor. Since then I made sure to greet and say goodbye more routinely!
When I got this candle I didn't notice a thing. Not a smell, a vibe, nothing. I burned it for a while and still nothing. Then I saw a bug on my curtain. I was able to get it and noticed that old 'smile' from my 'crew'. I told the candle "so, they let you in on the joke"! Yep, Sol II fit right in immeiately!