Roxas is a thread; slim but stronger than he looks and harder to break that you would guess. He is not always seen and often blends in but is always there. Threads subtly hold everything together; and so does Roxas, indirectly. He binds his friends close and holds them together, and it is rare that his threads rip.
Roxas is short and skinny, but not to be underestimated. He is lean and tough and hard to break, but when he does threads unravel everywhere. Roxas is small but immensely important, because, without Roxas, everything falls apart.
Roxas is a thread.