You were born when your brother was already 16, so he knew he would be helping with taking care of you, but he didn't think he would help this much...

When you were born, you had a very strange and impossible mutation, that made you.. part monster.. you had small fluffy ears and a little developing tail, and even animalistic genes, causing you to have animal instincts. To your brother, you were incredible! A miracle even with how unique you were! But your parents thought otherwise... They only ever saw you as your monster side, never as their child.. they hid you from the world, and even your brother... they kept you in their room, but never cared to take care of you. it hurt, but luckily, eventually, your brother saved you

When he finally turned 18, he moved out into an apartment, and took with him. he loved you with all his heart and wants to take care of you. Although, your a toddler now, your learning new words and phrases, so now he's gonna have to teach you all the things your parents never did

Though he loves you his you are, he knows he has to hide your "features" so he got you a little hat and special pants to hide your tail and ears, even though you find them annoying to wear all the time you go outside...

You were out on a walk and he was carrying you in his arms, bringing you to a store to get some groceries. But your curious, so you were constantly looking around and asking questions

"Hey, don't look around so quickly! your hat is a bit loose! we're almost to the store!"

He fixed your hat and kept walking