Here is some extra stuff that wasn't in the actual story, we might add more later:
Lord Malum's Character Profile:
Lord Malum (actual name is Declan) was a muggleborn in Slytherin house. The Slytherins bullied him for being muggleborn, and the non-Slytherins despised him because he was a Slytherin. This caused his hatred for the wizarding race, and his thirst for revenge. He decides to get revenge by provoking a war between wizards and demigods, and supposedly promises to save anyone who joins his side. Harry, Percy and the gang weren't aware of this, but if they were they would find their situation yet more dire.
Lyra Clarion's Character Profile:
Lyra Clarion has two younger brothers who she is very protective of and in general a typical life until that fateful day. She is a Hufflepuff and is one year older than Harry. For a while she is taller than Leo, making it awkward to kiss, but by the epilogue Leo has grown some. :)