At 22, Ramsey has the best years of his career ahead of him, and Bould sees him as a valuable asset.
"Aaron has been fantastic," he told Arsenal Player. "Seeing him in day-to-day training, he works extremely hard.
"He never moans, gets on with his game and has done everything he's been asked to do. He's physically fantastic and he gives something to the team. I think he's improving all the time.
"The great thing about Aaron is he never looks tired," added Bould. "He's never weary. He adds something to the team, he gives that physicality and on the ball he's improving all the time.
"He was getting a bit of stick [from some supporters] to begin with and I think he felt that a bit. It takes a big character to come back and he's come back massively."