Depending on the version, trolls die under sunlight or not. Sometimes they burn, sometimes they turn to stone...
In Fairy Dust, no such things happen, but many trolls are still afraid of the sun.
wow, that second panel was strikingly good!
I completely forgot about Trolls and sunlight, and it never even occurred to me that the trolls you present here were affected by it.
What is it about the sun that they fear, is it that are they just more at home when its dark?
On one hand, it wouldn't be spoilers if I answered that since it's all in the extra pages already, on the other hand, since Bot says it for Peonio on the next page, it'd be a little repetitive.