Ah sweet Red Ginger! How hard it will be non-biased in assessing you, but let us undertake this venture considering you were my first 6* in DMM FKG and I have ample experience with my rainbow waifu leading the charge.
Okay first, Red Ginger may appear as another glass cannon. Perhaps even a weaker glass cannon than previously judged girls like Cattleya. Her max HP surpasses BB and Cattleya, but not Dendrobium. Her defense is flipped in this regard as she is superior to Dendrobium but not BB or Cattleya. So this gives off the appearance that she is a bit more well rounded than the others. What may be the biggest downfall for many is her Attack stat, which is weaker than all three. Some may consider this reason to throw her into the trash. NOT so fast, my friends!
Abilities! Her initial abilities do not appear all that impressive, increasing attack for party members and overall squad speed on the map. But once she's fully bloomed, this beauty begins to show her true wonder that makes up for her attack stat. Increased skill activation rate AND increased damage of said skill for party members by 15%. Need I remind you that Red Ginger's ability is 4.3x damage to one enemy by itself and (here is the key) absorbs HP. Her ability that can do crazy damage if she's also given critical damage boost also is a life steal. And there is MORE. She not only counters 100% of the time, but also can Super Counter. Since she already counters all the time (rather than some that don't), it is only a matter of whether she counters or SUPER counters every single time she is hit. Plus if you pair her with the right units increasing damage and crits, she becomes a wrecking machine!
I have not fully fleshed her out yet on abilities and jewelry slots, yet let me tell you something. On a team full of rainbows including Anemone, Red Ginger has 99% of the time been the last to fall. With this past first week of the current RB event, my team was frequently up against level 90 12 million HP RB. Often times, the rest of the team fell around the 3 million HP damage mark. Red Ginger by herself finished the remaining 9 million because of how often she triggered her ability and replenished her health. Heck, often times she finished with full health. Now in my experience she falls like the rest against the 2nd week 18 million HP RB, but I believe if I had her more fleshed out she would begin to last a little longer.
It is for these reasons (truly non biased) of her abilities more than covering her stat weakness and my experience with her on my lead team that I decide her ranking, in which truly makes her barely squeaking into: S Tier
I know some may scoff or think I'm ridiculous. Initially I was thinking A-tier for Red Ginger. But I looked at the description also of what S-tier is expected and I could see her fitting in that description. And also after seeing what I've written, it has swayed my opinion that she just barely edges into S-rank because I believe she could be approach being broken once maxed out.
Waifu judgment:
She is my rainbow ultimate waifu for a reason. Done by one of the best FKG artists, dark-skinned being one of my fetishes, and long lovely blonde hair. She also is so cute with her teddy bear. Some may be put off by her pouty expression. But when you finally see her smile, it will melt your heart. Not to mention the body of a goddess!!! Full hips and large delicious breasts! Sometimes one of the 2 affection scenes of a girl may not be great. BOTH of Red Ginger's scenes are HOOOOOT!!!!!!
Without a doubt: S-CLASS TIER!!!!!
*Additional note for Japanese DMM FKG community: How dare you! Shame on you all for giving so many alternate version votes for Cattleya and Anemone whereas Red Ginger has yet to get a 2nd form. Such a travesty!