Aside from occasional typos (common enough in my long posts), I always use proper grammar in basically everything except chatrooms or specifically to invoke memes and such. So.

Well... that's a bit grey and depends on the metaphysical nature of the setting (which I don't know about). I am pointing out that the greek term for mind and soul, pscho/psyche, and the root of the very word psychic are one in the same. Basically, the mind and/or consciousness bear an innate connection (if they aren't a part of) the soul. The particulars really depend on the metaphysics present.

As for his abilities and what soul/ether is-ether, in myth, tends to vary between being like air or energy; different places have claimed lightning as a form of it, or it as the air of the divine realm, or as an ambient nonphysical energy-the stars were thought by some to be focused and intense ether. It's a bit grey and insubstantial by nature.
His ether-form in particular has a sense of vapor-ishness to it, like a cloud or mist, whereas his 'sword' is more like something between light and lightning and is more like 'energy' in traits. Part of that, though, is that it sort of doesn't fully exist as a physical object; it's literally immaterial and can only indirectly affect other ether/soul matter.
As for the sword-he technically can't even manifest that on his own. He carries an old, actual sword handle with long since broken blade that he focuses his own energy through and makes a replacement with. And, while this is really the greatest focus of his particular power (the ether form and floating are really weak supplementary abilities to it), it is the only form it can take-or rather, vibration. He can't alter the nature of his soul to do anything other than 'tazer'; only extend it outward, and in a pretty simple shape (a double-edged one-handed sword blade).
Regarding his growth, more an extension of his basic theme rather than new abilities-like how an animal will expand on basic traits as they grow up. There will be two distinct areas of it, like childhood and adulthood, one a bit of a base, the other basically 'completing' it. His powers, essentially, start as extremely basic ether abilities with the default grey-white color and a ghost/cloud-like feel. Later they will get colored by his own individual traits and character, becoming red and taking on a more fierce and somewhat dragon theme rather than ghost-no additional abilities, though, basically just more/stronger energy, and thematic sense (well, unless you're planning on actually implementing dragons. I'm not sure how that will turn out :/).