Positive
Milknose (aka "Milky")
Firestorm's best-friend since their kit-hood, and her first real friend. She likes to tease him mercilessly, and appreciates how caring he is towards her. Additionally, she has a huge crush on him and was distraught when he left the clan. When he returned, the tom seemed different somehow... She never properly had a conversation with him about it so she doesn't know what caused him to leave. When the camp was burning, Milknose (then Milkpaw) came back to get her out of the apprentice den which ended up saving her life. Unfortunately, they lost each other on their way to the river, and when she doubled back to find him, she found the tom unconscious. After waking him up they (barely) made their way to the river, where she promptly passed out. Apparently the tom remained by her side the entire time. This incident, however, left the tom with permanent lung damage and she feels incredibly guilty about the whole thing.
Snowybreeze (aka "Snowybreezy" and "Snowy")
Her Mother
Sunpaw (aka "Sunny" and "Grumpy")
Pinestrike (aka "Piney")
Her previous mentor, though their time together was short before the warrior's disappearance, she enjoyed what time they did spend together and still remembers how proud she felt on their first hunt.
Featherpelt (aka "Ears")
Neutral
Berryfrost
Lightningpaw (aka "Spots")
Firepaw has never actually had a conversation with the medicine cat apprentice, but she knows that the younger she-cat has spent a lot of time with Milknose, and she's jealous that his attention is diverted away from her. Despite this, Firepaw can't even bring herself to justifiably be mad at the she-cat, finding her pretty and acknowledging their similarities, plus the clear overwhelming amount of positive aspects (in her eyes).
Pignut
Firepaw didn't know the cat all that well, but was heartbroken when he died while protecting her from an eagle attack. She blames herself for this, and hopes that the warrior can find peace in StarClan.
Her Father
Firepaw never had the opportunity to meet her father, as he died prior to her birth. Based on the few stories she can remember her mother telling her when she was young, her father was a courageous cat and died honorable to protect her and her sister while they were in their mother's belly.