He would possibly have a younger friend in Violetta in his house, Arithmancy and Charms are among her better subjects so they might have shared interests there, she also dislikes herbology (i see that P) as she thinks it's a bit grubby. Regarding his blindness he might enjoy the feel of the expensive French fabrics that Violetta often has delivered as little gifts from her parents that she likes to show off.

As a tenous link Dorothea Potts is the governess of another blind student so they may have interacted as she would be quick to react to signs that he also needed help and would attend things with Hyacinth that possibly nim might see.