For Flik, he could be developed by showing his growth in confidence. Maybe he takes on more leadership roles within the colony, not just in his inventions. This would show that he has learned from his experiences and is becoming more well - rounded. For Atta, she could be shown to be more open - minded. For example, she could start to be more involved in Flik's inventions and see the value in his creativity.
One idea could be that Flik and Atta go on an adventure outside of the colony to find a new type of food source. This would test their relationship as they face different challenges together.
One possible scenario could be that Flik and Atta start off shyly after their first kiss. They might have little secret meetings away from the colony, sharing their dreams and fears. For example, Flik could show Atta a new invention he's been working on, and Atta could share her plans for leading the colony in a more efficient way. Their relationship could be a source of strength for both of them as they face new challenges together, like dealing with a new predator threat or a food shortage.
Well, their kiss could initially cause some chaos in the colony. Some of the more traditional bugs might be shocked or disapproving. But as they see how Flik and Atta's relationship makes them both better leaders and more dedicated to the colony, the other bugs could gradually come around. It could also lead to new traditions or ways of thinking in the colony. For instance, there could be new festivals or celebrations related to love and unity.