The animation is decent but...
As others have said, this Brother character of yours needs a lot of work on:
"Mary Sue, sometimes shortened simply to Sue, is a pejorative term used to describe a fictional character, either male or female (though male characters are often dubbed "Larry Stu" or some other rhyming male name), that exhibits some or most of the clichés common in fan fiction, making the character itself something of a cliché. Characters were originally labeled as "Mary Sues" for being portrayed in an overly idealized way and lacking noteworthy or realistic flaws. The definition today has widened considerably to encompass most clichés found in fiction - such as having a tragic past or being shown as instantly likable - and especially that the character in question acts as a wish-fulfillment fantasy for the author who created it." - Wikipedia