These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Foe Yay: Yoshida, considering the one-sided Ho Yay he had with Tatsuya
Ho Yay: Some one-sided Ho Yay for both Koutarou and Yoshida. Both almost seem in love with one of the Twins (Kazuya for Koutarou and Tatsuya for Yoshida). Tatsuya even jokes that Koutarou is like Kazuya's wife and tells Yoshida he's "just not into that kind of thing."
Koutarou is the catcher, and "wife" is a common slang term for the catcher half of a pitching battery. Koutarou even uses the term sometimes. "I'm a widow!"
In an early Day in the Limelight episode Koutarou goes into a slump because he thinks a girl he likes doesn't like him. He proceeds to tread dangerously close to I Want My Beloved to Be Happy regarding Kazuya and, when he learns that she does in fact like him as well, he glomps onto Kazuya and never mentions her again.
Koutarou basically admits that he was only playing baseball to be with Kazuya, and after Kazuya dies, he threatens to quit the team, saying that running up to Kazuya's smile after a game was "the only thing [he] lived for". Entire essays could be written on the subject of Koutarou's feelings towards Kazuya.
"Don't leave me alone, alright? For a second time."
Moral Event Horizon: In the Season 2 episode "Eye to Eye," Guillermo goes into a church to confess his sins. When the priest goes to the police station with the intention of revealing what has happened, Guillermo follows him in and slits his throat with the Tree of Life knife. This after in the previous episode, Avram told him that deviating from his mission would reduce him to merely a "godless murderer."