This poor excuse of a drawing (in a non drawing mood) was an idea I had pop into my head.
 
Blue decided to give Tavi a little gift as she had been kinda down the past few days. He went to her Luthier (an instrument maker) and got a small rosin cake for her cello bow and found some of her favorite candies, stuck them in a box and wrapped it. Later that day, he gave it to her and acted a bit goofy to try and cheer her up.
 
The reason for only one wing open is that he is flightless. He only has one functional wing, but the issue is not a physical one, its a mental one as to why the other does not work. She plays a role later on in helping him with that.