Nurture vs. Nature
From Twilight Heroes Wiki
Go to Naturalist Skills (level 12 skill, trained at the Training Room)
Nurture vs. Nature
Strange thing for a naturalist to say, but sometimes nature alone isn't enough. If you put enough energy into nurturing your relationship with others, you'll watch those relationships blossom.
+15% effectiveness from your sidekick
Cost: 12 PP
When Used
You put yourself into your most nurturing mindset, and go have a heart-to-heart with your sidekick. (Added for 45 minutes.)