How to feel towards Tony is complicated. On the one hand, why is the way he is easy to understand. The why part is easy to forgive. But, the harm he's done is very real and the injuries go deep.

Generally, I've accepted the root fact that he is doing the best he can. Maybe, if he could get some kind of help, he could do better. But, it's not clear what kind of help he needs or what kind exists in this world. Do counselors even exist in this world? If a school counselor ever showed up, what species and how terrifying would he/she/they/it be? (This is Gunnerkrigg. An entity that can only be correctly referred to as "It" is a very real possibility. Like Antimony said, everyone's afraid of clowns. . . .)

As a metaphor, the cage raises his problems to a new level.

But, is it a metaphor? I've been accepting Tony as damaged or lacking basic skills or related, normal problems. What if there's more to it than that? What if some part of him is literally in a cage inside his own mind?