Wizard Allegiance Triwizard Champion? Can Cast Fireball
Harry Gryffindor Yes No
Gandalf Hobbits Maybe? I don't think so...
Obi-Wan Kenobi Republic/Rebellion No No
Merlin King Arthur Probably invented the tournament Solid maybe

<table class="table">
    <thead>
        <tr>
            <th class="left">Wizard</th>
            <th>Allegiance</th>
            <th>Triwizard Champion?</th>
            <th>Can Cast Fireball</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td class="left">Harry</td>
            <td>Gryffindor</td>
            <td>Yes</td>
            <td>No</td>
        </tr>
        <tr>
            <td class="left">Gandalf</td>
            <td>Hobbits</td>
            <td>Maybe?</td>
            <td>I don't think so...</td>
        </tr>
        <tr>
            <td class="left">Obi-Wan Kenobi</td>
            <td>Republic/Rebellion</td>
            <td>No</td>
            <td>No</td>
        </tr>
        <tr>
            <td class="left">Merlin</td>
            <td>King Arthur</td>
            <td>Probably invented the tournament</td>
            <td>Solid maybe</td>
        </tr>
    </tbody>
</table>