
i love this manga , its characters, romance, story, etc, but my only problem would be saliphe... she is too perfect, ok, she is ignorant about the world, phisically weak but, personality wise she doesnt have any flaws, she like all that its good in the world, like the cliche shojo heroine, and everything else are mean to the pure cute girl, she is not a mary sue(yet) but i like characters with some flaws

Personally I think that might be her flaw. She is trying to be as perfect as she can to the point she hurts herself physically and mentally. However I think character development for her would be learning she can't do that. Meaning she will have to be pushed until she breaks and at the moment that doesn't seem to be the author's goal.
i feel that when they ask the messenger about asta he wont know anything even when both babies were together in the same basket, i think that the demon put him together with yuno