The first.. and only. --- from her profile: "Shadow was born as the only foal of her parents" Straight from her profile and hints to having no siblings, pass
Does that sadden you? --- no clear distinction of what is saddening? It being the first and only? Or being dark? I wouldn't pass this.
You and I are not alike, except for maybe one thing. --- pegasus/unicorn, mare/stallion, both are 5. Check check
That's really too bad. --- fluff
Good clues, pass.