Answer:
兒 GE, NI, GEI, JI, ko, chigo - child
四+小+ハ SHI, yo(tsu), yo(ttsu), yo, yon - four / SHOU, chii(sai), ko - small / Katakana "Ha"
甬 YOU, YUU - bloom, road
爰 EN, koko, ka(eru) - here, return, loose
羊 YOU, hitsuji - sheep
They all take the "fish" radical (魚 GYO, sakana, uo - fish) to become other characters.
鯢 sanshouuo - salamander, female whale
鰥 KEN, KAN, yamome - widow
鯒 kochi - flathead
鰀 KAN, amenouo, eno - trout
鮮 SEN, aza(yaka) - fresh, vivid, clear, brilliant