"Forged during the Age of Wrath as a mere construction worker, Boulder understands life's hardships more than anyone. Having faced insurmountable losses alongside the radical changes of Cybertron's governance, it's a wonder how he remains so optimistic and kind above all else. Boulder is the team mediator, he is the glue that holds them together. Always looking to solve any conflicts, always lending a hand, always being there for you when you're at your worst. His compassion is highly appreciated by those who know him.
Rags to riches, Boulder started out at the bottom, a Disposable labourer in construction. Slowly, over years, he climbed up in his career stealthily. Eventually, he landed himself a position as high as site supervisor; sometimes even assisting in other related fields such as architectural design. A massive change came when his friend Heatwave asked him to join him in the Rescue Bots ranks. It took a lot of back and forth arguing before Boulder was convinced. Then only after an arduous process of fighting with the higher-ups Boulder was finally integrated into the Rescue Bot ranks. Now stationed in Iacon, Boulder had to leave his home in Kaon permanently.
Another unexpected change in his life came on Earth. Boulder adapted into his new home quickly, he's in love with the planet in all its beauty. It's flora and fauna fascinates him to no end. Especially the people of it, he has a friendship with Graham Burns who sort of look up to him as a mentor. Unfortunately, his teammates aren't as quick to adapt to such a drastic change. They're not as used to it as he is. Oftentimes he finds himself sitting besides Heatwave's recharge slab and offering words of comfort. And for all his fondness for Earth he still misses certain aspects of his life on Cybertron, notably his teammate Nightflight. The Rescue Bots that weren't aboard Sigma-17 lay heavy on his mind."