Her best friend could be important. The friend might offer emotional support, babysit sometimes, or give Lucy some parenting tips that she learned from her own family.
Perhaps there is a doctor in the story. Since having a baby means a lot of medical check - ups, the doctor could be important. He or she could not only take care of the baby's health but also be a person Lucy can turn to when she has any concerns about the baby's development or if she notices something unusual.
Erza could also be a main character. Given her strong and motherly side, she would probably take on the role of taking good care of baby Lucy. She might be strict about following a routine for baby Lucy's care. Happy, the flying cat, could be another important character. He could use his unique abilities to search for clues on how to turn Lucy back to normal.
Maybe it could be about Lucy's journey in raising the baby, like all the challenges she faces, from sleepless nights to learning how to feed the baby properly.
Mary Jane's best friend could be a main character. This friend could be there to offer advice, help out with the baby, and also have her own sub - plot. For example, she might be dealing with her own relationship issues while seeing Mary Jane's new family situation.
The father of the baby could be a major character. He could be a loving partner, or there could be some drama if he's not as committed as Lucy. Her best friend could also be in it. The best friend might be the one she confides in about all her pregnancy fears and joys.
There could be Glen's best friend who offers advice on how to take care of the baby. For example, teaching Glen the proper way to make baby food.
Rittenhouse could be antagonists. They might see the baby as a tool or a threat to their plans for controlling time. They could try to kidnap the baby to use its potential powers for their own evil purposes.
The antagonists could be dark guild members. They might hear about the special baby that Lucy and Laxus are involved with. Maybe the baby has some sort of powerful magic within it, and the dark guild wants to steal the baby for their own evil purposes. So they constantly try to attack Lucy and Laxus to get their hands on the baby.
There could be a young wizard named Tom. He might be Lucy's sidekick or someone she mentors. He could have his own set of magic skills that complement Lucy's dragon powers. Another character could be an old dragon sage named Zoltar. He might be the one who gives Lucy advice and wisdom about her role as the dragon goddess.
There could be a human friend of Lucy, like a boy named Tom who is curious about her non - human nature and becomes her confidant. He helps her navigate the human world.
A midwife or a doctor in the area where Lucy ends up could be a main character. Since she's pregnant, she'll need medical assistance. This character could be kind and understanding, providing not only medical help but also emotional support. And then there could be a local villager who initially suspects Lucy but then becomes her ally as they get to know her story.