Mainly uses Manipulation and a little emission

At the age of 2, a little girl was given a pet rock by her dad, She basically never let go of it from that day forward. She would unconsciously pour her aura into this rock. As the years passed by, the rock became more and more 'alive'. When held, you can feel a pulse in the rock. In fact, it is so alive that the little girl could teach it tricks: the rock learned to jump, spin, and even sit perfectly still (crazy, right?). According to the little girl, the rock would tell her jokes and remind her to do her homework, but only she could hear the rock. Te rock is so loyal to the little girl that it has even bonked bullies on the head to protect her. The older both she and the rock get, the more tricks the rock can do, like growing in size, shrinking, changing shape into a sharper stone, and even heating itself up to extremely high temperatures: but these tricks took time to train the rock to do.

The pet rock uses manipulation to bring the rock to life, and emission to gift aura to the rock. Some tricks require the rock to dip into enhancement too- but this takes a lot of training.

Rules and Restrictions:

• The rock needs to be held by the user every night so that it may absorb their aura.
• The rock needs to be fed soil and water every day or else it will get lazy.
• It takes time to train the rock to do tricks, and the more complicated the tricks the more time it will take to train. It takes a similar amount of time to train the rock as it would to train a dog.
• The rock uses almost all of the user's aura, so in order to achieve basic nen techniques, the user needs to borrow aura from the rock, and in doing so make the rock temporarily weaker.