Nova Reactor is the whole package. Sunburst’s magic and intellect bolstered by the incredible strength and stamina of Full Steam (and that is before fusing again to become the magnificent specimen of a stallion Heartrong flare)
 
Soft spoken and gentle, despite his gruff exterior and always willing to lend a hoof to those in need. Anypony that can bond with him through shared interests is a lucky pony indeed as there is little he wouldn’t do for a good friend.
 
Hardworking to a fault, but even more so if promised some savoury pastries as a reward for all his efforts, that incentive really kicks this boy into third gear and for such a big lug, you wouldn’t think it would be possible for him to dart about all over the place, but then the Sunburst side of him would no doubt be able to muster up the most efficient use of those muscles with a spell or two.