I am curious and want to find out, how much of anime is not based on manga? What is the percentage of anime based on other sources, or on original scripts?

With the Arrow of Orion and his knife, Bell was able to free Artemis from that shell and we can also see that she was still alive at that point. So why did he still have to kill her?

You can hear bell like chords and it just sounds so amazing. It is quite short and is only a few seconds but Im hoping that section is apart of a whole song.