Traits about antsy in the book the schwa was here?

In the book "The Schwa Was Here" by Neal Shusterman, Antsy is portrayed as a loyal and caring friend to the main character, Calvin Schwa. He is known for his impulsive and adventurous nature, often getting himself and his friends into trouble. Antsy is also characterized by his quick wit and sharp sense of humor, which adds a lighthearted touch to the story's otherwise serious themes.