Voice by Shou Yukiya
Download the copybook for this Kanji
How to remember?
It looks like the horizontal version of the Roman numberal II.
This Kanji itself is a radical.
Do not confuse this Kanji with:
ニ-which is Katakana "ni". And its shape is exactly the same as the Kanji ニ.
こ-which is Hiragana "ko"