The vast majority of manga that involve some type of creature entering the hero's body and granting the host powers follow a particular pattern, but a series called Ghost Reaper Girl is deviating from the norm. It's refreshing, especially as this particular trope is currently becoming immensely popular.
Undoubtedly the most infamous example of the so-called heroic host is Parasyte. Even though the titular shapeshifting alien parasites are supposed to take over the host's body, their failure in this endeavor causes the host to gain the parasite's abilities while forcing the invading alien to share the same body. This strange predicament befalls Shinichi Izumi when a parasite he later names Migi accidentally infests his right hand, allowing Shinichi to utilize Migi's disgusting power in that very hand.
Ghost Reaper Girl takes this type of parasite/host relationship to a whole other level. Protagonist Chloe Love not only gains the power of the spirits that possess her, but her appearance, usually clothing-wise, changes to some degree as well. Normally, spirits would take full control over her body, but the two spirits she lets possess her are her friends and are more than eager to give her free rein for a variety of reasons. The spirit Kai Iod is a fan of Chloe's work as a failed C-list actor while Noel Ulthar looks upon Chloe as his master for showing him kindness. But most importantly of all, it is because of how perfect she is as a vessel that makes them willing to give up control. Her spirit vessel capabilities are so attractive and alluring to spirits that Chloe finds herself having to fend them off on a perpetual basis as they try to possess her.
During Kai Iod's possession, Chloe dons his gothic attire and becomes highly proficient in the art of scything as made apparent by how she wields a chained scythe that materializes out of thin air. Since Noel Ulthar was originally a cat, he bestows upon Chloe his feline abilities. In these cases, both Kai and Noel are able to communicate from a particular area of the transformation much like Migi who speaks to Shinichi Izumi from his right hand.
A more recent example of a manga that doesn't emulate this communicative characteristic is Kaiju No.8 where Kafka Hibino transforms into one of the manga's titular monsters upon swallowing a strange mosquito-like creature. Unlike Chloe, Kafka is able to suppress the transformation, and the parasite doesn't speak to him.
In all honesty, Ghost Reaper Girl's rendition of the heroic host trope shares more similarities with possessions that cause the host to undergo a transformation. However, the parasite is almost always in control in these cases and can't necessarily use the original powers that they wielded before the possession. The best example of this is in Dragon Ball GT, when the villain Baby takes over Vegeta's body, causing the Saiyan to dramatically change in appearance the more powerful Baby becomes. Baby Vegeta might look different and possess incredible new powers, but Baby is in complete control. In Jujutsu Kaisen, the mighty cursed spirit Sukuna possesses Yuji Itadori's body and gives him a boost in power, but endeavors to control Yuji. Each time Sukuna gains control, Yuji transforms. But when Yuji suppresses Sukuna, he stops transforming.
In truth, there isn't really anything like Ghost Reaper Girl. Upon her possession, Chloe transforms, gains incredible abilities, keeps control of her body, and communicates with her possessors who even leave her body when they're no longer needed. All hosts in other manga series only share some of these qualities, mostly because their parasites are hostile while Chloe is actually friends with hers.