Maitha is one of the first characters in Sword of Convallaria to join your team, and while she's not one of the best characters in Sword of Convallaria, it's not a bad idea to have her on your team. She might be a Defender-type character, but her offensive skills should be more than enough if you build her correctly.
SWORD OF CONVALLARIA MAITHA BUILDING GUIDE! Skills, Gear, and More! (SoC)
In addition to leveling up Maitha as you play through each battle in Sword of Convallaria, you can choose to rank her up to grant her new abilities and boost her stats. The best Maitha build is one that turns Maitha into a tank-style character, focusing on the support she can provide as a shield for your other teammates.
If you navigate to Maitha's character screen and click on the small plus symbol next to the word "Rank", you will see a series of rank levels. Every second rank has a skill choice associated with it. To create the best Maitha build in Sword of Convallaria, you should choose the following skills as you rank Maitha up:
Maitha's rank skills are divided into Guard and Survival. The above list is a mix of skills from both sides, giving Maitha more of a Support/Tank feel.