Both Legolas and Aragorn were very impressed by the bravery and altruism of the Dwarf. The Golden Prince of Mirkwood decided that no matter what happened to himself, he would give Gimli a hand.
"If I remember correctly, my Lord, the recruiting notice clearly stated all able-bodied, brave fighters were welcome to join. It did not exclude any particular Race. The very fact that Gimli, a Dwarf, had came alone to Rivendell is testament of his bravery and abilities. Besides, one of our commanders is Human, so this is not just an Elven Army. If you were willing to follow the orders of a Man, but would not allow a Dwarf to enlist, other Peoples will speak ill of us, believing that the Elves were prejudiced and intolerant of those of smaller stature. The reputation of the Eldar is at stake here, please reconsider and allow Gimli to be a representative of his People in this new joint army. Only then, can we claim that our troops acted on the entire Middle Earth's behalf," orated Legolas.