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The impossibly earnest robot sidekick who keeps Ratchet's chaos from drifting off-course.
Clank matters because he stabilizes the duo without flattening it. His polite intelligence gives Insomniac a perfect contrast point for Ratchet's rougher edges, and the games know exactly how much mileage that gap has.
Example
When the pair split, you immediately feel how much of the series' chemistry is built on their different ways of processing danger.
Why it matters
Clank matters because great buddy franchises depend on friction that feels affectionate, not forced.
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