While the only other people with G'raha's tattoos are linked together by the Main Scenario and Louisoix, we still don't know what exactly the tattoos mean. Clearly they mean something, but exactly what that is isn't defined. The most likely case is that it's simply a mark of Students of Baldesion who reach a certain rank, but none can say for sure.
Male miqo'te are rare NPCs, so having him show up at all was actually kind of surprising. Anyway, male miqo'te aren't the only race / sex combination underrepresented in the story; there are no major female elezen, much less one in the Scions and/or voiced (unless you count Alisae, and the Binding Coil is for most intents and purposes optional)... oh, wait, Iceheart is a female elezen. There is exactly one voiced Roegadyn male: Merlwyb's aide what's-his-name, implied to have been Mistbeard. He showed up in and hasn't been seen since 2.2. The only other recurring non-Merlwyb Roegadyn NPCs are comic relief (Hoary Boulder, Trachtoum), Rammbroes, or Slafborn; none of them are voiced or play a significant role.
So one antagonistic voiced female Elezen who showed up in 2.4 and 2.5, and one benevolent voiced male Roegadyn who showed up in 2.2.
If you want to get into clans it's even worse... forget their sex, there are zero Hellsguard, Keepers of the Moon, or Duskwight in the Main Scenario PERIOD. There are also no important female Highlanders or Plainsfolk, at all, and the only recurring Plainsfolk male (Teledji) was an utter douchebag... well, OK, Wedge is a male Plainsfolk, but he's mostly fallen by the wayside and never was voiced, and the same could be said to be true of Rammbroes (I forget if we ever visited St. Coinach's Find during the Main Scenario).
Maybe Pipin will do better.
... so male miqo'te aren't the only ones who got the short end of the stick as far as Main Scenario representation goes.
While most people can agree seeing G'raha seal himself inside Syrcus Tower was pretty sad... don't succumb to despair. Lament not losing him, but instead fight for a future he would be proud of... isn't that what he wanted to you do? If you can't accept your sorrow, how can you build a better future and honor G'raha's memory and wishes? It's not easy... but we all have our part to play.
Unless you want to reject your part, but we've already gone over that...