Awakenings are given to himes that needed buffs and improvements to match up to other and new SSRs, not because they're poster girls for the game. Sol is already a great hime so she did not necessarily need one yet. Her receiving one as early as she did is most likely because of the poll mentioned above. Without it, she would most likely have never been the first light hime to get one cause the other SSRs light himes need more of a buff than she does.