- Fanfic Fuel: This light novel (where Motoyasu gets to redo his past adventures and mistakes) has inspired people to write about what they think Ren and Itsuki would do in the same scenario.
- Fan-Preferred Couple: Motoyasu/Naofumi over any of Naofumi's relationships over the loops, thanks to them meeting in better circumstances than the original story. It's implied the 2019 April Fool's Day short story of the main series is a subtle Take That! to this phenomenon, as its heroine is an avid slash shipper specifically of Spear Hero's version of Motoyasu/Naofumi.
- Fandom-Specific Plot: In Pixiv there are quite a few stories about Motoyasu and Naofumi meeting their original timeline counterparts.
- Ho Yay: Motoyasu and Naofumi, dear lord. As this is a timeline with a much more innocent Naofumi and a much different Motoyasu (i.e. he can only see women as pigs from the get-go this time instead of at the end of his Trauma Conga Line), he becomes fiercely protective of Naofumi in the first timelines.
- Moral Event Horizon: Malty crossed it long ago, but it's revealed that she poisoned Motoyasu's filorial, Freon and later lied to him by claiming that filorials aren't supposed to live for long and can't withstand the quick growth. Before his fight with Naofumi, Malty said that Filo was in pain and was forced to grow due to Naofumi's brainwashing shield, which increased Motoyasu's grudge against him. Realizing that Malty had killed Freon is what contributed to his Despair Event Horizon in the main series.
YMMV / The Reprise of the Spear Hero