<p>Ottar clearly said to ais in SO vol 11,that ais isn't as good as she thinks she is,fighting against people,even though she maybe good among her peers. Although he said that she has surpassed ottar and finn in killing monsters,and she is more suited in that area. In zeus and hera familias era,familias were forced to fight against each other and zeus and hera familias didn't care one bit about their counterattacks. And also ottar and mia and loki top three survived the dark ages too,so their levels of experience in fighting,tactics,etc., are still far apart. If bell should beat ottar,ais and ryuu training isn't gonna be enough.He needs something more,like training with mia or loki top three or ottar himself. Bell being level 7 may help him against ottar,i mean he can somewhat make up that experience with his brute strength,but unless bell will have more great training,he doesn't have a good chance against ottar as level 6 much less than level 5.
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