Zelda wants to build areas to store food and other resources for the animals they have living up on the island! That is very important to her! They need to make sure they take good care of their animal friends! She'd also like to look more into understanding the Song, the Planet's soul, etc etc spiritual mystic things.

Dirk I'm less certain of. He probably wants to build a secondary suit of labs on the island base though. + has to make security on that level is up to scruff! He'd like to look more into setting up shields and other protections.