Continued story:1. Amamiya Ren (Persona 5) and Velvet Crowe (Tales of Berseria) vs Rean Schwarzer (Eiyuu Densetsu: Sen no Kiseki) and 2B (Nier: Automata)
They released on the decade of 2010s (most of them are released on 2016 - 2017, unless Eiyuu Densetsu, which released on 2016 in English version, and 2013 in original one). All of them are protagonists from 4 respective JRPG franchise(s).
Note: For Rean Schwarzer's avatar, use the Sen no Kiseki III / IV version one.
2. Shin and Heroine (Amnesia) vs Arsené Lupin and Cardia Beckford (Code: Realize ~Guardian of Rebirth~)
Both of them have similar appearances, and they're from anime that adapted from Otome games (Visual Novel-like, but for Female audience).
3. Kurogane Ikki (Rakudai Kishi no Eiyuudan) vs Amagiri Ayato (Gakusen Toshi Asterisk)
Same LN (Light Novel) adaptations, both of them released in 2015 (both of them celebrate 5th anniversarry), and they have similar personality.
4. Ichinose Guren (Owari no Seraph) vs Willem Kmetsch (SukaSuka)
Both of them have similar appearances.
Note: This exhibitions only happens if Willem elimianted. (Probably in Elimination Stage)
5. Sol Badguy (Guilty Gear) vs Ragna The Bloodage (Blazblue)
Both of them are made by same company. And their clothes dominated by red. They are protagonist(s) of their respective series, and popular among FGC, who likes anime-style of Fighting Game.
6. Louis Amamiya (Code Vein) vs Julius Visconti (God Eater 2)
Both of them made by same developer (and publisher as well).
Another continued story (just joking):
7. Satomi Rentarou (Black Bullet) vs Itsuka Shido (Date A Live)
They have similar hairstyles (lol), similar in ages, and ironically Both of them are LN adaptations.