|Behind the scenes|
The mention of "Father Banion" at the end of The Unknown (as part of Cassie's parents embarassing her about Jake) implies that the family is Catholic.
After the Yeerks discovered that Animorphs were in fact humans and not Andalite bandits, the Animorphs had to evacuate their families. Walter and Michelle were the first to be told about the war and to be relocated to the Hork-Bajir valley. He and Michelle were both extremely interested in studying the Ax's and the Hork-Bajirs' physiology.
When the Animorphs decided to begin recruiting disabled children, Cassie disclosed the news to her father. Walter was appalled that they were using such children for war, but apparently did not tell anyone, as nobody else confronted Jake about the issue.
- On the Animorphs television series, Walter is named John.
- He is also referred to as "John" in earlier promotional materials such as Cassie's ID card and the Animorphs Alliance secret handbook.
- He is first referred to by name as "Walter" in Book 49.