this really has potential, the music is fitting, audio balancing is consistent between characters and background and i quite like the art style, not too often you see people use coloured outlines.
as for the episode itself, it's just a set up episode with teaming up the main characters and a bit of exposition about ones status. important for world building and as part of a series is great, but alone is a bit boring (main reason i'm giving this particular episode a 3 instead of a 4).
one last thing is the animation, i like it for the most part, just some bits are inconstant such as the cape doesn't blow while walking, and when the hair is moving the side of the cape is being blown but not the hood. not bad but it's a little distracting.
with all that said i'm looking forward to the next part to see how these characters get developed.