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The first two were drawn by Acy. I'm unsure who drew the Chibi since Acy was the one that ordered it for me. XD

Yari (槍)
Spears that can directly attack opponents through their troops. Yari are spears that attack through enemy troops, thus they're always dealing damage to the enemy sword. They have higher Mobility than Tachi, but have slower growth rates in return.

Tropes associated with the Yaris as a whole:

Armor-Piercing Attack - Yari are the only swords to have a vertical range, meaning that they can pierce through enemy troops and damage enemies directly instead of having to destroy the troops first like all other swords.

Chromatic Arrangement - The red, green and blue combination represented by Tonbokiri, Otegine and Nihongou, respectively.

Difficult but Awesome - On top of being one of the harder types of swords to get, they have a slower growth rate than Tachis and can take a lot of resources to repair, making them unwieldy for starting players. However, at higher levels they can one-shot the notorious high-mobility Yari right through its troops found on later maps in the game.

Japanese Spirit - Each of the yari represent one of the three virtues, which is appropriate as they as a group are a symbol of Japan.

Power Trio - So far, the three known yari are grouped together as Three Great Spears of Japan.

Rare Random Drop - One of the rarest types of blade available.

Red Eyes, Take Warning - A trait they all share is some hint of red color in their eyes, and they're quite deadly when trained up. Tonbokiri has reddish pupils, Otegine's eyes have a red tone to them, and Nihongou's appear to turn red in his Awakening portrait.

Nihongou

Voiced by: Kenjiro Tsuda
"I'm the best spear in Japan, Nihongou. I'm barging in. So, how many cups did you drink before I arrived?"
A spear owned by the Kuroda Clan, who won him when his previous owner lost a drinking game. He's a heavy drinker who loves sake and is usually laid back, but is also very prideful.

Tropes associated with Nihongou:

The Alcoholic - Like Jiroutachi, he really likes his sake and constantly has a gourd of sake with him. Unlike Jiroutachi, he's more laid back. His constant drinking is a reference to how one of his former masters, Fukushima Masanori, lost him to the Kuroda clan in a drinking game.

Berserk Button - Do not dismiss the Kuroda family. Hasebe did and Nihongou considered snapping him in half for saying that.

Friend to All Children - Word of God says he gets along well with the tantous owned by the Kuroda clan.

Goggles Do Nothing- Wears a pair of goggles on his head that don't serve much purpose other than to look cool.

Hidden Depths - Despite his smug and boisterous attitude, he genuinely holds the Kuroda family in high regard. While he taunts Hasebe in their first recollection, in the second he seems to want Hasebe to move on from his grudges to be happier.

Japanese Spirit - Of the three, he represents koyuu natural talent; he's very aware that he's a highly treasured and powerful spear.

Kaleidoscope Eyes - His eye color actually changes depending on his portrait; his default and internal affairs portraits give him blue eyes, his action portraits give him brown eyes, and his Awakening portrait gives him red eyes. This is based on his spear's shaft having an inlaid mosaic of blue, brown, and red.

Lightning Bruiser - Considerably faster than Tonbokiri and stronger than Otegine.

Perma Stubble - Adds to his rugged and manly appearance.

Rare Random Drop - Not craftable, he was initially only available as an extremely rare drop on the boss node of the last stage of the August 2015 event. He was later added to the base game in the update which introduced level 6-4, where he's an extremely rare drop on the boss node.

Smug Super - Other than being an alcoholic, he would like to remind you that he really is the best spear in Japan and is part of the imperial collection. In his recollection with Hasebe, he's even more smug about it and calls Hasebe "a lowly sword tailing on his master's coat", referencing that in the past, Nihongou's owner was the subordinate of Hasebe's owner, but in modern days, Nihongou's rank as part of imperial Collection is still higher than Hasebe's.