Phineas Flynn is a character from Phineas and Ferb and is a minor character in The Knights of the Multiverse. He and his step-brother Ferb Flethcher often spend most of their time building crazy inventions to make everyday as fun as possible, and often aids The Knights with some of their creations.
Phineas's most notable trait is his incurable optimism, constantly looking on the brighter side of things. He's also extremely smart, creative, persistant, and able to endevour in immensely large projects and activities with the help of his step-brother. His hospitality is a driving force behind many of his plans. As intelligent and industrious as he is though, he's often oblivious to the emotions and intentions of those around him, often , even walking casually up to someone who clearly has ill intent.