One of my favorite pages in the Trese Lite: Postcard Book 1 is the page where Alex is seen riding a paper boat with Crispin and Basilio in the land of the duwende (tiny earth-elemental creatures). It wasn’t shown much in the actual comics nor the Netflix show how they were like growing up together so this little peek was so nice!
The postcard is from Alex to her father and says the following:
Dear Papa,
All is well in the land of duwende. I feel you sent me here with the Kambal to learn something. We have not encountered any threats ever since we’ve arrived. I’m beginning to worry that I’ve begun to relax my defenses.
~Alex
I feel like Anton sent the kids there together to be able to bond with each other. More specifically, he wanted Alex to learn to trust and accept the Kambal since Alex was strongly against their adoption into the Trese family (she even wanted them killed). Being trained to be a Babaylan-Mandirigma from such a young age, I guess Anton also wanted Alex to have some fun memories to look back to from her childhood. The plan seems to be working with how Alex is able to feel relaxed with the boys in their trip. In the picture, the Kambal also look much more older than when they were taken in by Anton (in the comics). So, it really shows how slowly it took for Alex to finally accept them.