By blood or adoption
They are nor related by blood, definitely not! Unless being related by spilling blood at the same time then no.
Mikasa is not Eren's sister and do not believe what is said on Wiki Fandom because it says Mikasa is Eren's Adoptive sister, if they were related in any way she would be him ADOPTED sister.
FUN FACT
Wiki is a lie, the problem with Wiki is that if you have a Wiki account you can edit anything that is written or write a statement about anything and people will read and believe it.
Mikasa was never officially adopted, let me repeat more dramatically
*clears throat*
MIKASA WAS NEVER OFFICIALLY ADOPTED!!!!!!!! I LOVE EXCLAMATION MARKS!!!!!!!!! AND I LOVE CAPITAL LETTERS!!!!!!!!!
I am against the idea that she was adopted and I'm sorry for you people who think that Eremika is Incest including a friend of mine AnimeTammie I will not tag because I don't want her reading this 😂
That's about it...
Au revour kittens
Kat xoxo 😽
