All - Oldest to Youngest

This is how I perceive the Slender Brothers, and if you're interested, you can read it, beautiful.
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This consists of Slender, Trender, Offender, Splendor, and lastly Tender.
Fan art and comics depicting them exist, that's how we mostly know about them, and I'll use a wee bit of those as headcanons to show you my perception, so credits goes to the people if i didn't credit them already.