Mariko Higurashi/Relationships

Issei Hyoudo
She met Issei when they were in kindergarten back then. Apparently Mari was having a hard time fitting because of her anxiety. So Issei approached her and ask if she wants to be his friend and play with him. After she agrees with him, those two became best friends and sworn to each other they will forever be best friends for life.

During in their middle school years, Issei developed a crush on Mari. However he just shruggs it off thinking he's just going through puberty.

After their promotion (middle school graduation) Issei was shocked and sad to hear that Mari will be moving to Kyoto because of family emergency.

Rias Gremory
TBA

Irina Shidou
Mari and Irina are child hood close friends. Unlike Issei, Mari is aware that Irina is a girl. However Irina seems to notice that Mari doesn't seem to go to her house that often for unknown reasons. She also told Mari about her crush on Issei, but Mari doesn't take the slightest interest about it.

Yuuto Kiba
Yuuto was the one who accompanies Mari around Kuoh.

Asia Argento
She first met Asia when Issei during their hangout after Mari returns from Kyoto.

Koneko Toujo
TBA

Seiko Higurashi
Mari cares about her foster mother and she is really thankful that she took her in. When she found that she was adopted back then, she felt upset and ran away (was found later on).

Kokoro Higurashi
Mari is protective towards Kokoro

Vali Lucifer
Upon their first meeting, Mari sort of finds him attractive but as she and Asia witnessed he mocks Issei's weaknesses and lack of strength. she initially dislikes him and calls him a jerk.