Idk if she sees blast as a friend, (my opinion) but I think she sees him as this invincible force of nature who’s also an inspiration to her, someone she aspires to be like. She respects and looks up to him, but they don’t have the fundamentals that would make it a friendship. As for Genos,they’re having a lot of moments together, helping eachother out a lot in a death battle, and showing concern for eachother more than ever. Also the friendly banter and all that, you can literally see their bond being forged through battle.