Vikare is very enthusiastic about his dreams of non-interstellar flight, but he hides it by being falsely excited about spaceflight due to it being a necessary obligation to be filled by bronzebloods. His hive is decorated with lots of posters emphasizing the excitement and adventure associated with space travel, and dozens of spacecraft models are strung from the ceiling. Despite all this, Vikare keeps posters of aviation hidden behind the former. 

He seems hesitant to share his true feelings about flying with others as mentioned in one of his bad endings and needs a great deal of trust before he can bestow his ideas for flying machines with others. He describes his sketches as being very close to his heart, which is why he's so hesitant on sharing them. He is also shown to be very emotional at times, best illustrated when he weeps after misunderstanding the player's implied question or when the player accidentally mocks his ideas of aviation.

Vikare has a strange way of speaking and makes lots of different facial expressions when conversing with the player. He uses lots of fancy and unfamiliar idioms and metaphors, to the point where not even the player understands a word he's saying. The player still finds his ecstatic nature charming, though, and tries to understand him the best they can.

I'd imagine him having a thick irish accent and sounding like a gentle giant that means no harm.