Senthil and Owl (puzzle)

Guess who is who.

PS. The owl sits on a branch of a tree right outside my office, mostly sleeping during the day. It took a bit of keen observation by Nandu, a colleague (of mine, not the owl), to spot it, and a lot of persuasion to get me to take a picture. Senthil can be seen occasionally on the balcony of my apartment and, just like the owl, is a creature of the night, with a little more knowledge of the language French.