Bradley tends to have a negative attitude towards nearly everything, but it's especially evident anytime he's around Milo. He complains about Milo's very presence anytime he's forced to share a space with him, and he often attempts to persuade Melissa to spend time with him instead of hanging out around Milo.
Bradley is a fair-skinned teenage boy with dark eyes and jet black hair with bangs that parted to one side. He's often seen with an annoyed expression.
He wears a pair of nearly rimless glasses and a gray shirt with thin white plaid lines and white cuffs that end at his elbows. His shirt has two pockets set symmetrically on the front and a downturned collar. Bradley wears a pair of dark gray jeans with visible seams and lighter colored cuffs, and his sneakers are a dark gray, with lighter colored soles and laces. He also owns a burgundy colored bookbag.
As of The Phineas and Ferb Effect, his right arm has become a brown vine. This is a paradoxical leftover from the second Pistachion Takeover, as he had been turned into a Pistachion before the takeover had been averted.
- Bradley's voice actor also portrayed Phineas Flynn in Phineas and Ferb.
- Bradley has been described as the polar opposite of Martella's previous role, which would make him a negative, non-creative, non-triangular-shaped-headed guy. Which he kind of is.
- Bradley's plant arm was a change originally intended to be applied to Melissa.
- Bradley is the first human to get mulched, alongside Irving Du Bois.