At the time of the creation of the post, Ryuu had not yet joined the Hestia family, so this post is closer to fanfiction. Not yet announced about her intentions or their absence.
But I have long had a few ideas about her updates on the fifth level. Also, I don’t mind adding ideas from other fans, with a little description. (How does this relate to Ryuu or where could it come from?)
Potentially one could get:
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Development Abilities.
Spirit Healing.
Automatically begins to restore the owner’s mind at a low speed after using magic. It will be extremely useful for Ryuu due to the presence of healing and attacking magic. Very compatible with her incredible parallel singing and her extra abilities.
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Abilities.
Furious wind.
The feeling of revenge for the deceased members of her family and her hate does not pass without a trace. Her body well remembered this state being at the fourth level. This ability massively strengthens all of Ryuu abilities at the cost of proper judgement due to a heavy increase in the desire to battle. Reminds Finn's ability or the fury of the amazons. It can only work if someone special for her is in a difficult situation, that is, Syr or Bell.
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Skills.
Long lasting magic.
Allows you to delay its attacking magic for accurate strikes against one opponent instead of mass strikes, for greater effectiveness. The basic idea is that shown in volume 14 (DM). Also prolongs the duration of the effect of her healing magic.
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Magic.
Aura of regeneration.
Allows you to cast long-lasting Noah Heal magic on multiple people. Unlike Riveria’s magic, the main effect is healing. Gradually restores stamina. Also slightly increases the target's resistance to physical and magical attacks.