Chapter Text
When Dadan the Bandit called with bad news, Monkey D. Garp added another reason to his list of why he hated pirates. Some stinking small time pirates who thought they were big shots made his grandson blind. Garp was absolutely livid and could only find comfort in the fact that the pirates were burned alive in Gray Terminal. Though Garp would have preferred to mutilate them with his bare hands.
His first thought when he received the news, however, was worry for his stupid grandson. The idiot hid the fact he was losing his sight until it was completely gone. If they had known earlier, they might have been able to save some of his sight.
His second thought was about how he could no longer try to pull his grandson into joining the marines. Well, if Garp was completely honest, he didn't want to force his biological grandson to join the marines anymore. If Luffy was going to live without the ability to see the wonders of the world, then Garp would make damn sure that he would at the very least live in happiness. And if that meant letting his grandson be a pirate, then so be it. He could still annoy Ace into becoming a marine. One was better than none after all.
(Another part of him would prefer if his grandson didn't do anything and simply stayed on Dawn because it would be safer for his boy, but Garp knew that trouble would find Luffy even if he stayed put.)
His third thought was to find someone to properly teach Luffy and Ace some stuff about Haki. Observation Haki, specifically. Garp thought long and hard on the matter before deciding that he would only let the very best teach his grandsons. If the very best just so happened to be a pirate, well, Garp worked with criminals before. He was certain that everything would turn out okay!
So with that thought in mind, Garp took a few months vacation and left Marineford. He rampaged a bit in the New World and then returned to Dawn Island with his grandsons' teacher in tow.