It needs a bit more depth to be an actual character. Right now it is just a cipher.
I think the character's purpose is to get sucked into an adventuring group as a minion/ henchman and slowing them down. So instead of them going "Oh cool a wizard for the party"... they will eventually be groaning at their misfortune for hiring this idiot. Go to Comment
I agree that this character needs some flesh and bone though the idea of a caster being blind has possibilities. There are detriments but benefits as well. He would be immune to vision attacks and illusion spells but more susceptible to sound based attacks. Even Braille could be a cool twist, though a form of rune. Forgive me if I ramble on. Below is a little suggestion for character development.
Perhaps a little on what he was like as a child and how he became a mage feeding into the story of his blindness and eventually his creation of Braille/rune scrolls. He would have to create his own scrolls since he'd be a rarity. Perhaps he finds a tome that he could not read when he had his sight. Where and how did he come across this tome? After going blind he has feelings of hopelessness over the course of a week. Eventually growing frustrated, he manages to find his library. Once there he begins throwing papers and books in a fit of rage as he clumsily feels his way around the room. Growing weary and distraught, he settles down and inadvertently places his hand on that strange tome he couldn't read previously and realizes that he senses something about this tome, strange and exciting. He sits down and caresses the cover of the book with his finger in anticipation and letters begin to form in his mind. He concentrates and soon words begin to form. Sucked in by curiosity, he sits for many days reading, stopping only for life's essentials before returning to continue his study of these mystic pages of strange runes. Once he absorbed the tome, he was endowed with the ability (a feat) to create runes that can be read with the hand not the eye. He could fashion these runes into his staff through use of the skills of carving he developed as a child and likewise into scrolls by lightly stabbing with dabs of spell components on the end of a thin dagger. Only another of his kind could use his staff and scrolls.
With one or two good magic items he could be a formidable foe.
Let the mind run from there. Hope this helps. Good luck. Go to Comment
I misunderstood the purpose of the original post and instead came up with a viable NPC/PC. I hope that some of my comments are helpful. The idea of a character that inadvertently slows a party down is interesting but I find my group slows themselves down enough without help. They once spent almost an entire session planning the assault on an empty cabin, well empty except for some animated household items. :) Go to Comment
The party wakes up in an inn around a table with wine goblets near at hand. They have forgotten all that happened the last day. As they seek to find the truth they come in contact with a man that gives them a job which pays quite nicely.
When they have finished with this rather dubious assignment they are invited to dinner by the the man...