The monster who have five eyes with a lot of tentacles keep attacking them without wasting any seconds.
Even Vivian try to slice the tentacles using her Samurai, it doesn't enough as the tentacles keep growing. There is no blood in the tenticles but when it comes to their body there was a dark liquid start to coming out.
'It seems like you are not hurting when we slice your tenticles, so that is why you just using your tenticles to protect your body.