Therese Alexanderite/Relationships

Naofumi Iwatani
She shares the same opinion of L'arc about Nafoumi. Like L'arc, she too refused to believe Nafoumi to be the shield hero. After learning from Raphtalia about his crafting skill, she asked him to make a jewel for her

She was struck in awe after seeing the bracelet crafted by Nafoumi which became her obsession and always felt that she underpaid Nafoumi. Therese was moved to tears and always bragged about the bracelet to her allies or searched for gems or craft in par with the bracelet.

Therese gives utmost respect for Nafoumi, after seeing his crafting skill and felt his talent is unmatched by any. Therese also gave Naofumi lessons in magic when he was in their world. Once, Glass warned L'arc to improve his crafting skill unless he wants to lose Therese to Nafoumi. But L'arc admitted that though Nafoumi raised the hurdle for him, both Therese and Nafoumi have a platonic relationship.

L'Arc Berg
They always got into scuffles from time to time which shows their closeness. Therese doesn't restrain herself from using physical force against L'arc in case of disagreement

It was revealed that L'arc has romantic feelings towards Therese. but her view on L'arc was not clearly mentioned.