Unlike the other teammates, Knight Rokuro is not so easily trusting (even compared to Yoru), and automatically fights whoever she sees as a threat. With heavy armour in her Magic Pocket, and her trusty Kokuyoseki no Tsurugi (Obsidian Sword) in hand, Rokuro is a frightening teammate at times. Despite her sometimes steely demeanor, it is very much possible to overexcite Rokuro. However, doing this could end up somewhat chaotically...as Rokuro does not hold back, no matter her mood.
As part of The Knights of the Round (a large group of Elemental Guardians who have trained to serve their respective Elemental Guards as Knights), Rokuro showcases a very serious demeanor at times. Despite coming off as no-nonsense, she doesn't mind treating children and younger characters to treats. As a mother, she is incredibly overprotective of the younger generations. This may not always be a good thing.
Rokuro does not regard anyone kindly. Even if she's capable of empathy and getting well with others, it can prove difficult with her strong personality. Yet, she is much like Hakune and Takuto, where she will often give others advice if they need it, and will crack jokes with her true friends.
In regards to her magic, Rokuro is a force to be feared. Unlike most demons, her Earth Magic does not effect a target's magic defense, but their actual defense. With her bulky defenses and patience in battle, it's possible for Rokuro to decimate an entire party single-handedly (although she does not shoo away help by any means). Using her sword and shield to her advantage, you're much more likely to see Rokuro crushing foes with her own strength than with her magic...although, she does not refrain from using it if necessary. As the Knight of Earth, Rokuro is fairly strong-willed as well. She cannot be possessed due to her iron willpower.
Since Ragnarok's Call has passed, Rokuro has begun to train Takuto in the ways of being a Knight, although she leaves the offensive training to the Flame Knight. She teaches Takuto how to become more calm in the face of danger, and aims to raise his defensive abilities and Last Stand's technique a bit more. Though she is as stern as ever, she has quite the soft-spot for the Kiku brothers, and has offered her home as a refuge for them whenever life at home starts to get too tough. She has since made a permanent home in the Flame Region, though she occasionally visits her old Knight's room in the Earth Region from time to time.
It took quite a while, but Cryslove, who had begun to spoil Rokuro with love, eventually broke through Rokuro's awkward shell, became her Soul Mate. While Rokuro is quite shy when it comes to being affectionate (not to mention she's very inexperienced in that regard), she seems to want to make Cryslove very happy, and will eventually bend to her wishes if she persists enough. She seems to take great joy just seeing Cryslove snuggle close to her and purr.
While Crysta gives her a similar treatment at times, Rokuro doesn't consider them close at all, and is extremely awkward around Crysta. Fortunately for Rokuro (and unfortunately for Crysta), physical affection doesn't affect her greatly. Rokuro seems extremely weak to being kissed, however, since she'd never been kissed or spoiled in affection anytime prior. She's one of the more monogamous demons of the group, however, and seems attached solely to Cryslove at this point. She doesn't want to have any children (or carry them anyway), however she'll gladly give Cryslove Earth Seeds in order to help the population in Lovcore grow and become more varied.
A (somewhat psychedelic) reference of Rokuro's powerful uppercut. Notice the full-body effort, and imagine the pain!