Originally Posted by
Tenhou
I haven't played on the JP side but from what i know for awakening you need:
-Full affection
-Max level
-Gold or higher
And also max skill level if you want to change the skill for some of them. Note that they are different, but you need to awaken the character to be able to awaken the skill afterwards.
If you want to awaken a unit you need:
-3 appropriate gold units or CC'd silver units, depending on what class your character is
-An awakening spirit sold at the trading post.
Basically it is like a second CC where you get more levels and a passive skill like Spica giving 7% more damage to archers or other units gaining plus in stats.
From what i have heard, you want to awaken an archer rather fast, Spica especially is a good choice due to the above mentioned passive as well as her skill change becoming one that lets her deal magic damage instead of physical when used.
Another good choice is apparently Elizabeth if you have her, since she gains increased range. Also Sherry due to her passive making all gold/silver characters better and you might still use a fair deal of them early on.
As for sapphires, they're apparently somewhere between gold and plats in usefulness and the special thing about them is that they are giveaway units, aka you use a code to get them ingame.
Now the JP players can take over :P