I think that episode 25 is too loooong compared to the manga. In the manga, Hel slabbed Yamino. She wants Loki to die so that she could be with him. Hel didn't lock Mayura up with chains. She just put Mayura in a room and Mayura wants to play hostage by chaining herself up. Hel let Mayura out later. Loki was with Reiya (who turned to Freya on seeing hiow Loki cares for Mayura). Hel thought Loki hated her because she's ugly (like in norse mythology, she's particially decomposed) When Loki said that she's beautiful, she got touched and starts to fade away. The quote "How could a father hates his own daughter" was said by Freya instead of Mayura. That was a short chapter and I think that the anime is really too long.