The heroine is good at forming groups to kill monsters. The equipment is listed below.
There is a younger brother who has a sister who controls the sinister attributes.
Temporary good-for-nothing neighbor + senior Vongola's quasi-10th generation
A Loli, the holder of the Lion King who is older than the heroine but still a junior
A warlock with a weird personality but still a good person (the heroine's personal opinion, not the author's opinion).
A middle school madman who screams and bites every day but is a gentle person (same as above)
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(PS: All the above equipment are bound)