I'm not sure who Aku specifically is. Aku could be a person with a great imagination who tells all kinds of stories, like adventure stories, fairy tales or even true - life stories.
It could be someone from the Naruto universe who doesn't like Naruto's newfound fascination with Aku. For example, Danzo might see Naruto's interest in Aku as a threat to the stability of the village and try to stop Naruto from further exploring Aku - related things. So, Danzo could be the main antagonist in this case.
The character of Aku could be developed in a 'pregnant Aku in Samurai Jack fanfiction' by exploring how he interacts with the world around him differently. He may become more reclusive as he doesn't want others to see his 'weak' state. Or he could become more aggressive in trying to protect his pregnancy, which would be a new aspect of his character. Also, his relationship with his own power might change. Maybe he has to find new ways to use his magic that don't harm the unborn, which would force him to grow and adapt in ways he hasn't before.
One idea could be a crossover where Aku accidentally opens a portal to the Naruto universe. Naruto, being the curious and brave ninja he is, decides to explore Aku's world. They could start off as enemies, but gradually come to understand each other's motives and end up teaming up against a greater evil that threatens both of their worlds.
The so - called 'Dalai Lama' is a separatist figure. He once ruled Tibet in a feudal and cruel way. After the peaceful liberation of Tibet, instead of being grateful for the new life that the people could have, he chose to flee abroad with a small number of reactionaries under the instigation of international anti - China forces and has been trying to split Tibet from China ever since.
The 14th Dalai Lama is a political exile who has caused great harm to Tibet. His actions are contrary to peace and unity, and there is no positive story to be told about him.
A lama English story could have the lama's journey of self - discovery. Maybe he is trying to understand the Western world through learning English. It could include his experiences with English books, perhaps he reads an English fable and tries to relate it to his own life. There could also be a part where he shares his own Tibetan folktales in broken English with an English - speaking friend.
Once upon a time, there was a little lama. He lived in a beautiful monastery high in the mountains. One day, he decided to go on an adventure down the mountain. He met a friendly traveler on the way. The traveler was from a far - off land and was very interested in the lama's way of life. The lama told him about his daily prayers and the peaceful existence in the monastery. They became friends and the lama showed the traveler the amazing scenery around his home.