Marisa's prized mini hakkero is a small furnace that uses magic as fuel. While its flames are strong enough to burn down a mountain, it also works on low heat and can provide a source of wind in the summer. It is great for heating, experiments, and battles of bullets.

Normally, Marisa keeps the mini hakkero hidden in her skirt or her hat. She needs it to use Love Sign: Master Spark. (She is not actually shooting lasers out of her hands when she uses this Spell Card.)

You can adjust the amount of fire the mini hakkero creates. At high levels, it can shoot lasers. Apparently, Marisa is currently researching a way to make it shoot out a dispersed Master Spark...

Marisa always says that she can't live without her mini hakkero. In the past, there was an incident where tools moved on their own and normally friendly youkai went wild. The mini hakkero was one of the tools that started acting strangely. When the firepower-loving Marisa saw her little furnace shoot out incredible flames, her eyes sparkled with excitement.

When Rinnosuke heard that Marisa was living in the Forest of Magic on her own after her family had cut ties with her, he gave her this magic item. He restored the furnace with hihi'irokane, a legendary non-rusting crimson metal that is resistant to change in any environment.