Kup is a tough old coot. He's almost as old as rust, in fact, and he was plinking Decepticons and Ick-Yaks with acid bursts from his trusty musket laser long before most of you turbo-revvin' young punks were born. In his day, lasers didn't need to use light; they did whatever they were told to do. And liked it.
He's probably had a thousand adventures, Kup has, and he'll be glad to relate a story of any one of them at any time to a willing audience. The Dinobots love Kup's war stories, lapping them up like cheap energon, and don't seem to mind when he inadvertently leaves a piece out or changes the story between retellings. Old memory chips'll do that to you. Other Autobots can be less patient, and Kup finds this disrespectful and irritating. If there's one thing Kup dislikes, it's when young punks don't respect their elders. If they'd only listen, they might learn something. Hot Rod is one of the worst offenders in this way, but he's a good lad-bot, and Kup will straighten him out sooner or later, even if it takes a tank of Sharkticons.
Occasionally, Kup's vast experience gets in his way. When a situation doesn't remind him of anything, he has trouble figuring out what to do. This doesn't happen very often though.
His alt-mode is a Cybertronian Pickup Truck.