740. Why are these Katakana seen in a lot more characters? ノ ル ト チ キ

Answer:

They are all radicals!

ノ  The "No" radical - diagonal sweeping stroke ⼃

ル  The "Hitoashi" radical - human legs ⼉

ト  The "Boku" radical - oracle ⼘

チ  The "Kan" radical - to dry, shield ⼲

キ  The "Tehen" radical - hand ⺘