Helmut Krabbe (ヤドカリー ,Yadokarī, Lit. Hermit Crab) is an enemy appearing in chapter 4 and Stories of Legend.
The name says it is a crab but it looks like a hermit crab (hermit crabs aren't actual crabs!). Can survive 1 lethal strike and it has fast attack rate. Meatshields are good here. It won't be much of a threat if stalling is fast.
Being the 3rd alien enemy, it shouldn't be much of a threat. Only problem is the lethal strike resistant ability. To kill it, use meatshields and Valkyrie Cat. If you have Bahamut Cat, use him. Then use cat cannon to end it.
Later on, Helmut Krabbe becomes very easy. Shouldn't be a problem at all.
Took out a 45-year loan on a durable home to cover up the THAT growing from his rear. Still spends every weekend at open houses. Can survive one lethal strike.