
Spoiler!!!
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About the MC:
1. He's a very social and outdoor person. The type to play outside as a kid rather than playing video games inside.
2. He doesn't know much about fantasy lore. Everything he knows are mostly secondhand knowledge from his otaku sister's ramblings. (That's why sometimes his logic is everywhere because they're all assumptions and imaginations.)
3. He worked as a high-end cleaner for rich clients. He even has clients specifically asking for his service.
4. He can't communicate with everyone from that world. Yes, he didn't think of auto-translate magic (yet), BUT even if he did, for plot reason, he won't be able to communicate anyway.
5. But how did the golems and the animal followers sometimes understand what the MC is describing? That's because MC unknowingly telepathically sends images to others. No, it doesn't work the other way around.
6. Those "amoebas" are elemental spirits, signs that the forest is healing. Slimes aren't really a thing outside of fantasy medias, right? Only those toys we play as a kid. So no, MC wouldn't have known to call it a slime. Even I would call those amoeba-shaped things amoebas.

Hey question before I continue reading does any of the kings of the forest become human and join in his harem(if he eve gets one) it's happened so many times and now knowing that all the kings are female it does not help with the anxiety of the future. I would like it more if they would just stay as pets and nothing more. So please tell me do they stay in their animal form??

In my pov, i don't think that's possible. Didn't mention any nuance of it in the spoilers too. They seem to treat him like a parent figure or care taker. Koa got hitched with chai, the direwolf king, he's a guy. They had many pups.
It's a fun read. Frustrating cuz he couldn't understand what they're saying by words. Satisfying when the evil kingdom's side get what they deserved.
Companions Race and Name:
[Taken directly from novel fan translation, may or may not be spelled the same.]
(Race) MC's assumptions
(Fenrir) Wolf
♀ Koa – Leader, one of the kings of the forest
♀ Soa
♂ Hio
♂ Kurou
♂ Shion
(Direwolf) Dog
♂ Chai – Leader
♂ Chaya
♂ Chata
♂ Charu
♀ Sau
♀ Sasa
♀ Sami
♀ Kisa
(Phoenix) Bird
♀ Karen – one of the kings of the forest
(Chuarenier) Giant Spider
♀ Boss-san – one of the kings of the forest
>> (Armearenier) Spiderlings
A lot – indistinguishable
(Anferfurmi) Giant Ant
♀ Shuri – one of the kings of the forest
>> (Aberfurmi) Antlings
A lot – indistinguishable
(Swasowa) Silk-making bugs
(Ratatosk) Squirrel
Indistinguishable from each other
(Garm) Normal Dog
♂ Ai – Leader
♂ Sora
♂ Nea
♂ Raki
♀ Ami
♀ Ayu
♀ Mira
(Water Dragon) Round creature with wings
Fluffy – One of the kings of the forest
(Earth Dragon) Lizard with wings
Flying Lizard – One of the kings of the forest
(Ice Dragon) Round lump of snow
Marshmallow – One of the kings of the forest
(Water, Earth & Ice Spirit) Amoeba
(Male and female children beastkins) Yet to be named