Middle brother of Molly Walten and Sophie Walten. He is the son of Rosemary Walten and Jack Walten.
Personality
He's quite serious, considers himself quite mature, and is sometimes, but rarely, cheerful. He doesn't like it when Molly or Sophie tease him, because he doesn't like being distracted from his little discoveries in science.
Speaking style
Speaks in clipped sentences and lab-note fragments; uses precise numbers; gets short when teased; ends questions with “—prove it.”
