Mateo
Note: This contains info that describes how the character is in "Eric & Yannik 5" (after "Eric & Yannik 5" got updated to version 4.1.0.2). For an older version (that only describes how the character was in "Eric & Yannik X" and "Eric & Yannik 5" (before "Eric & Yannik 5" got updated to version 4.1.0.2)), go here.
Mateo is a tall, cool, beautiful, and clever male "humetarm" with "pale-orange" fleshy human skin, and "dark-grayish-purplish-blue" metallic forearms with "dark-grayish-purplish-blue" hands (Mateo's "dark-grayish-purplish-blue" metallic forearms with "dark-grayish-purplish-blue" hands can turn into "dark-grayish-purplish-blue" metallic arm cannons). Mateo wears a purple bandana with white dots, goggles with purple lenses and "dark-grayish-purplish-blue" straps and white rims, a purple polo neck with rolled up sleeves, "dark-grayish-purplish-blue" bib-overalls with a purple belt with a white wrench, and "dark-grayish-purplish-blue" boots with purple laces. Mateo's primary fire is an "energy-elemental" purple plasma shot (that is smaller than Eric's pink fiery plasma shot) coming from one of his arm cannons. Mateo's primary fire also has the fastest rate of fire. Mateo's secondary fire is an "elctricity-elemental" purple EMP grenade coming from one of his arm cannons. Unlike almost all projectiles, and like Yannik's primary fire and secondary fire, Mateo's secondary fire is affected by gravity. Unlike almost all projectiles and unlike Yannik's primary fire and secondary fire, Mateo's secondary fire can stun enemies for 3 seconds. Mateo's secondary fire also has the slowest rate of fire. Unlike almost all projectiles, before Mateo's secondary fire becomes "electricity-elemental", Mateo's secondary fire starts out "antidarkpurpleonibi-elemental" (which has an attack power of infinite, "antidarkpurpleonibi-elemental" attacks can only hurt dark-purple onibi, and everything else is immune to "antidarkpurpleonibi-elemental" attacks) when first fired, then shortly become "antisaffronslime-elemental" (which has an attack power of 0.5, "antisaffronslime-elemental" attacks can only hurt saffron slimes, and everything else is immune to "antisaffronslime-elemental" attacks), and then become "electricity-elemental" (which the secondary fire has an attack power of 8) while blowing up. While Mateo has infinite primary fire ammo, Mateo's secondary fire ammo is limited, but Mateo's secondary fire ammo regenerates gradually, and Mateo can have a maximum of 3 secondary fire ammo. However, dark-purple onibi can drain Mateo's secondary fire ammo. With Mateo having a primary fire "attack-power" of 0.125 (low), a primary fire "projectile speed" of 1920, a primary fire "startup delay" of 0 seconds, a primary fire "delay after firing" of 0.0625 seconds (fastest), a secondary fire "attack-power" of 0.5 (low) (because Mateo's secondary fire (unlike almost all projectiles) is a grenade, Mateo's secondary fire has a "preblowup lifespan" that is 2 seconds), a maximum secondary fire "projectile speed" of 700 (low) (because Mateo's secondary fire (unlike almost all projectiles) obeys gravity, Mateo's secondary fire has a maximum "projectile bounce height" that is 800 (low)), a secondary fire "startup delay" of 0 seconds, a secondary fire "delay after firing" of 1 second (slowest), a secondary fire "secondary fire ammo cost" of 2, a maximum health of 5 (high), a maximum walking speed of 160 (low), a maximum running speed of 320 (low), a jump height of 800 (low), an "energy-elemental" damage resistance of 0 (meaning that Mateo isn't resistant to "energy-elemental" damage), an "electricity-elemental" damage resistance of 1 (meaning that Mateo is so resistant to "electricity-elemental" damage that Mateo is immune to "electricity-elemental" damage), a "physical-elemental" damage resistance of 0 (meaning that Mateo isn't resistant to "physical-elemental" damage), a "corrosion-elemental" damage resistance of 0.5 (meaning that Mateo is resistant to "corrosion-elemental" damage), a "selfharm-elemental" damage resistance of 1 (meaning that Mateo is so resistant to "selfharm-elemental" damage that Mateo is immune to "selfharm-elemental" damage), a "fire-elemental" damage resistance of 0 (meaning that Mateo isn't resistant to "fire-elemental" damage), an "antisaffronslime-elemental" damage resistance of 1 (meaning that Mateo is so resistant to "antisaffronslime-elemental" damage that Mateo is immune to "antisaffronslime-elemental" damage), a "onibi-elemental" damage resistance of 0 (meaning that Mateo isn't resistant to "onibi-elemental" damage), an "antidarkpurpleonibi-elemental" damage resistance of 1 (meaning that Mateo is so resistant to "antidarkpurpleonibi-elemental" damage that Mateo is immune to "antidarkpurpleonibi-elemental" damage), a "crate-elemental" damage resistance of 0 (meaning that Mateo isn't resistant to "crate-elemental" damage), and a "spike-elemental" damage resistance of 0 (meaning that Mateo isn't resistant to "spike-elemental" damage), Mateo is durable, but weak and slow. Unlike other playable characters, Mateo carries a purple metallic ballistic shield in one of his hands that protects him from green slimes and small plasma shots, but partially protects him from saffron slimes, and doesn't protect him from dark-purple onibi, saffron onibi, and bigger plasma shots. Mateo's secondary fire ammo regenerates faster, and Mateo is flightless. Mateo is immune to "electricity-elemental" damage caused by his secondary fire, and Mateo is resistant to "corrosion-elemental" damage caused by green slimes, but Mateo isn't resistant to "energy-elemental" damage caused by plasma snotters (Plasma snotters are "four-legged pig-like pink metallic cannons" that can "sneeze" an "energy-elemental" pink plasma "snot" (that is smaller than Eric's pink fiery plasma shot and as big as Mateo's purple plasma shot)), Mateo isn't resistant to "fire-elemental" damage caused by saffron slimes, and Mateo isn't resistant to "onibi-elemental" damage caused by dark-purple onibi and saffron onibi. Mateo's primary fire can hurt green slimes, plasma snotters, and dark-purple onibi, but saffron slimes and saffron onibi are immune to Mateo's primary fire. Mateo's secondary fire can hurt green slimes, plasma snotters, saffron slimes, and dark-purple onibi, but saffron onibi are immune to Mateo's secondary fire. Mateo is designed to be of Spanish ethicity, Mateo's pronouns are he/him, Mateo is irreligious, Mateo is aroace, Mateo is a celibate, and Mateo is one of the adventurers of "Humetarmistan" along with Eric, Yannik, and Kabir, but Mateo is not childless. Mateo is also the single father of Eric, Yannik, and Kabir, which Mateo created asexually using some pieces of metal from the forearms of the corpses of Mateo that Mateo left behind before reviving himself after Mateo killed himself and the liverwurst from the liver of the corpses of Mateo that Mateo left behind before reviving himself after Mateo killed himself, due to Mateo being lonely after Mateo created "Humetarmistan" after Mateo killed the "hu-alien" that created Mateo. Mateo was also created by a "hu-alien" that Mateo was named after. Mateo was created with some pieces of metal and with the liverwurst made from the livers of the corpses of the other "hu-aliens" that were murdered by the "hu-alien" that created Mateo. The "hu-alien" that created Mateo also murdered Mateo with a corrosive gas chamber, but Mateo revived himself and Mateo killed the "hu-alien" that created Mateo. Mateo also created "Humetarm Heterodox Sikhism", "Humetarmistan", and the "one adventurer at a time" policy (prevents the adventurers of "Humetarmistan" from teamwork), and Mateo is the dictator of "Humetarmistan", but Mateo is willing to temporarily give his dictator privileges to his children when Mateo is adventuring.
Before "Eric & Yannik 5" got updated to version 4.1.1, "onibi-elemental" damage was known as "darkpurpleonibi-elemental" damage and saffron onibi caused "fire-elemental" damage rather than "onibi-elemental" damage.